Self-study
Support Most apartments on the upper floors of The Vista Arms apartment building have scenic views. ██ █████ ██ ██ ███ ████████ ██ █████ ███ ██████ █████████ ████ ██████ ██████
Summary
There is at least one studio in the Vista Arms building with scenic views, because most apartments on the upper floors have scenic views. 
Missing Connection
The author is concluding something about studio apartments (at least one has a scenic view) based on something that is true about the upper floors (most have scenic views). For the conclusion to follow from the premise, we need to know that all or most apartments on the upper floors are studios. If that is true, then there is a minimum required amount of overlap between studio apartments and apartments with scenic views.
6.
The conclusion of the argument ███████ █████████ ██ █████ ███ ██ ███ █████████ ██ ████████
a
All of the ██████████ ██ ███ █████ ██████ ██ ███ ████████ ████ ██████ ██████
We do not need information about the lower floors. We need to know that a minimum amount of studio apartments are located on the upper floors.
b
All of the ██████████ ██ ███ ████████ ████ ██████ ██████
We cannot assume that there are any studio apartments in the building. We need to know that a minimum amount of studio apartments exist in the building, and are located on the upper floors.
c
Most of the ██████████ ██ ███ ████████ ███ ██████ ███████████
In the world (C) introduces, the studio apartments could be heavily skewed (or entirely) on the lower floors. It’s possible that none of them have a scenic view.
d
Most of the ██████████ ████ ██████ █████ ███ ██ ███ █████ ██████ ██ ███ █████████
(D) does not tell us where the studio apartments are (or if the building even has them). (D) only tells us that, of all apartments in the building with scenic views, most of them are on the upper floors.
e
Most of the ██████████ ██ ███ █████ ██████ ██ ███ ████████ ███ ██████ ███████████
This matches our prediction. If (E) is true, then there is at least some overlap between the studio apartments on the upper floors and the apartments on the upper floors with a scenic view.
