Self-study
All parrots can learn to speak a few words and phrases. ███ ███ ███████ ████ ███████ ████████ █████████████ ██████ ████ ██ █████ ██████ ██ █████████ ███ ██ ███████ ██ ███ █ █████ ███████ ██████ ███ ███████ ████████ ████ ████ ██████████ █████████ ███ ██ █████ ███ ██████ ███ ████ ████ █ █████ ██ ████████████ ███
Summary
All parrots can learn to speak a few words and phrases. Most (almost any) parrots will show tremendous affection for an owner who raised the bird from a chick by hand-feeding it. Some parrots native to Australia can be counted on for a sweet temper. Some parrots do not have equally pleasant dispositions. 
Notable Valid Inferences
Some parrots that can learn to speak a few words and phrases can be counted on for a sweet temper.
Some parrots that can learn to speak a few words and phrases show tremendous affection for an owner who raised the bird from a chick.
22.
If the statements above are █████ ████ █████ ███ ██ ███ █████████ ████ ██ █████
a
Some parrots that ███ █████ ██ █████ ███ █████ █████████
Must be true. If all parrots can learn to speak and at least some parrots are sweet tempered, then there must be some overlap between parrots that can learn to speak and parrots that are sweet tempered.
b
If a parrot ██ ███ ██████ ██ ██████████ ████ ██ ████ ██ █████ ████████ ████ ██ ██ ██ ████████ ██ █ ██████
Could be false. We don't know that being hand-fed is a necessary condition for being sweet tempered.
c
The sweetest-tempered parrots ███ █████ ██████ ██ ██████████
Could be false. We know that some parrots native to Australia are sweet-tempered, but we don’t know whether they are the sweetest tempered. Perhaps the sweetest tempered parrots are located somewhere else.
d
Australia is the ████ █████ █████ ███ ███ ████ █████ ████ ███ ████ █████ ██ █████ ███ ██ ██████ ██ ███ █ █████ ███████
Could be false. We know that there are parrots native to Australia with these characteristics, but to say that Australia is the only place is too extreme. We have no reason to think those kinds of parrots don't also exist outside of Australia.
e
All species of ███ █████ ████ ███ ██████ ██ █████████ ███ ██ ███████ ██ ███ █ █████ ███████
Could be false. We know that some parrots native to Australia can be counted on for a sweet temper. But we don't know about other kinds of birds.