Every time people get what they want they feel pleasure. Pleasure is a ... ...

Every time people get what they want they feel pleasure. Pleasure is a natural result of getting what one wants. We can conclude that no one fundamentally desires anything except pleasure. Which one of the following uses questionable reasoning most similar to that used in the argument above?
(A) I sure am enjoying the party even though I was sure I would not, so I guess I wanted to come after all.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2013 LSAT (PT69): Logical Reasoning B