Bunuel
Accepting the proposed constitutional amendment would be a poor decision for the Supreme Court to take,
on the basis of avoidance of expanded executive power alone.
(A) on the basis of avoidance of expanded executive power alone
(B) on the grounds of avoiding expanded executive power alone
(C) solely in that, the expansion of executive power should be avoided
(D) if only because the expansion of executive power should be avoided
(E) while the expansion of executive power should be avoided
(A) on the basis of avoidance of expanded executive power alone
Unclear meaning. unnecessary use of "on the basis of avoidance of ". Eliminate this option.
(B) on the grounds of avoiding expanded executive power alone.
Unclear meaning. Incorrect use of "on the grounds".
(C) solely in that, the expansion of executive power should be avoided
Correctly places "solely in that" in double comma. Which is not necessary in getting the intended meaning of the sentence. "solely in that" also tells us the reason why Accepting the proposed constitutional amendment would be a poor decision for the Supreme Court. Lets keep this option.
(D) if only because the expansion of executive power should be avoided
"if only because" is redundant. Eliminate this option.
(E) while the expansion of executive power should be avoided
"while" is used to indicate two things taking place simultaneously. Since we in this sentence we don't have two things taking place simultaneously. Use of "while" is incorrect. We can eliminate this option.
The correct answer is C.