Self-study
Support If all works of art evoke intense feelings, and this sculpture is a work of art, then it follows that this sculpture evokes intense feelings. ███ ████ █████████ ████ ███ █████ ███████ ████████ ██ ████ ██ ██████ ████ █████████ ██ ███ █ ████ ██ ████ ██ ███ ███ █████ ██ ███ █████ ███████ █████████
Method of Reasoning
The stimulus can be diagrammed as follows: 
15.
Which one of the following █████████ ██ ████ ███████ ██ ███ ███████ ██ █████████ ██ ███ ████████ ██████
a
If all classes ███ █████████ ███ ███ ███████ ███ ██ █ ██████ ████ ██ ███████ ████ ███ ███████ ███ ██ █████████ ███ ███ ███████ ███ ██ ███ █ ██████ ██ ███ ███████ ███ ██ ███ █████████ ██ ████ ███████ ███ ███ █████████
Mismatched premises. The stimulus gives a conditional relationship with two sufficient conditions in conjunction, fails the necessary condition, then concludes that either one of the sufficient conditions must fail. (A) gives a conditional relationship with two sufficient conditions in conjunction (if all classes are canceled AND biology lab is a class, then biology lab is canceled), but (A) then fails one of the sufficient conditions (/biology lab is a class) instead of failing the necessary condition.
b
If all medical ████████ ██ ████████████ ███ ████ ████████ ██ ████████ ████ ██ ███████ ████ ████ ████████ ██ ████████████ ███ ████ ████████ ██ ████████ ██ ██ █████████████ ██ ███ ███ ███████ ████████ ██ ████████████ ███ ████ ████████ ██ ███ ████████
Mismatched conclusion. The stimulus concludes that either one of the two sufficient conditions must have failed; (B) concludes that both of the sufficient conditions must have failed (that not all medical research is significant AND this research is not medical).
c
If all vitamins ███ ████ ██ █████ ██████ ███ █████████████ ██ █ ████████ ████ ██ ███████ ████ █████████████ ██ ████ ██ █████ ██████ ███ █████████████ ██ ███ ████ ██ █████ ██████ ██ ███ ███ ████████ ███ ████ ██ █████ ██████ ██ █████████████ ██ ███ █ ████████
The argument structure for (C) matches the structure of the stimulus:
d
If all sciences ████ ███████ ██ ████████████ ███ ████████ ██████████ ██ █ ████████ ████ ██ ███████ ████ ████████ ██████████ ██████ ███████ ██ ████████████ ███ ████████ ██████████ ████ ███ ████ ███████ ██ ████████████ ██ ████████ ██████████ ██ ███ █ ████████
Mismatched conclusion. The stimulus concludes that either one of the two sufficient conditions must have failed; (D) concludes by specifying which of the two sufficient conditions must have failed (/clinical psychology is a science). The stimulus does not specify which of the two sufficient conditions must have failed, so (D) does not match the structure of the stimulus.
e
If all classes ███ ████████ ██████ ████ ██ ███████ ████ █████ ██ █ ███████ ███ ███ ███████ ██ ███████ ███ █████ ██ ███ █ ████████ ██ ████ ███████ ███ ███ █████████ ██ ███ ███████ ██ █████
Mismatched premises. The stimulus gives a conditional relationship with two sufficient conditions in conjunction; (E) gives a conditional relationship with one sufficient condition (all classes are canceled today) and two necessary conditions (today is a holiday and the library is closed).