Self-study
Human resources director: While only some recent university graduates consider work environment an important factor in choosing a job, they all consider salary an important factor. ████████ ███████ ███ ████ ███████ ███ ████████ ██████ █████ ██ █████████ ██████ ██ ████████ █ ███ ███ █ ███ ███████ ██████████ █████ ██████ ██████████ ████████ █████████ ████████ ██████ ██ █████████ ███████
Summary
Every recent university graduate considers salary an important factor in choosing a job. Some recent university graduates consider work environment an important factor. All recent graduates consider vacation policy an important factor. The only workers who consider stress level an important factor are a few veteran employees. (This implies that recent grads do not consider stress level important.)
Notable Valid Inferences
We can draw conclusions based on the Some and All statements about recent grads or based on two of the All statements about recent grads. For example, we can conclude that some people who consider work environment important also consider salary important. And we can conclude that some people who consider work environment important also consider vacation policy important. Those aren't all of the inferences we can draw, but just examples. There are too many inferences that one can draw, so it wouldn't be reasonable for someone to articulate them all up front before going to the answers.
24.
If all of the statements ██ ███ █████ █████████ ████████ ███ █████ ████ █████ ███ ██ ███ █████████ ████ ██ █████
a
All people who ████████ ████ ███████████ ██ █████████ ██████ ██ ████████ █ ███ ████ ████████ ██████ ██ █████████ ███████
Could be false. Although we would be able to conclude that some people who consider work environment important also consider salary important, or that all recent grads who consider work environment important also consider salary important, we don't know about all people.
b
At least some ██████ ███ ████████ ████ ███████████ ██ █████████ ██████ ██ ████████ █ ███ ████████ ████████ ██████ ██ █████████ ██████ ██ █████
Must be true. As shown below, we can combine the claims that some recent graduates consider work environment important and that all recent graduates consider vacation policy important. We know there must be at least one recent graduate who has both of those qualities, so that implies at least some people who consider work environment important also consider vacation policy important. 
c
At least some ███████ █████████ ██ ███ ████████ ████ ███████████ ██ █████████ ██████ ██ ████████ █ ████
Could be false. We know that some veteran employees are the only workers who consider stress level important. But we cannot infer anything else about these veteran employees. In addition, although some recent grads consider work environment important, this doesn't imply that some veteran employees do not consider work environment important.
d
All people who ████████ ████████ ██████ ██ █████████ ██████ ██ ████████ █ ███ ████ ████████ ██████ ██ █████████ ███████
Could be false. Although we would be able to conclude that some people who consider vacation policy important also consider salary important, or that all recent grads who consider vacation policy important also consider salary important, we don't know about all people.
e
No one for ████ ██████ ██ ██ █████████ ██████ ██ ████████ █ ███ ████ █████████ ██████ █████ ██ █████████ ███████
Could be false. Although we would be able to conclude that some people who consider salary important do not consider stress level important, or that all recent grads who consider salary important do not consider stress level important, we don't know about all people.