Bunuel
According to an esteemed psychologist, the only way to maintain a positive frame of mind is to discard all negative thoughts and their sources;
not to think about them, worry about them, analyze them, but to simply discard them.
(A) not to think about them, worry about them, analyze them, but to simply discard them
(B) not to think about them, to worry about them, to analyze them, but simply discarding them
(C) not thinking about them, worrying about them, analyzing them, but simply discarding them
(D) not thinking about them, worrying about them, analyzing them, but to simply discard them
(E) not thinking about them, worrying about them, analyzing them, but simply to discard them

Project SC Butler
For SC butler Questions Click Here Expert's Global Official Explanation:Parallelism + Verb Forms• All elements in a list must be parallel.
A. Trap. This answer choice fails to maintain parallelism among “think about them”, “worry about them”, “analyze them”, and “to simply discard them”; please remember, all elements in a list must be parallel.
B. This answer choice fails to maintain parallelism among “to think about them”, “to worry about them”, “to analyze them”, and “simply discarding them”; please remember, all elements in a list must be parallel.
C. Correct. This answer choice maintains parallelism among “thinking about them”, “worrying about them”, “analyzing them”, and “simply discarding them”.
D. This answer choice fails to maintain parallelism among “thinking about them”, “worrying about them”, “analyzing them”, and “to simply discard them”; please remember, all elements in a list must be parallel.
E. This answer choice fails to maintain parallelism among “thinking about them”, “worrying about them”, “analyzing them”, and “simply to discard them”; please remember, all elements in a list must be parallel.
C is the best answer choice.