Question

one strategy to answering a multiple-choice question is to a) be aware of negative wording b) only change your answer once c) mark the shortest answer d) always guess ''a''

Answer 1

A. Be aware of negative wording

Answer 2

The best answer of the choices above is: a) be aware of negative wording.
You should not be changing your answers at all (b) unless you are absolutely certain that you made a silly error in choosing your first answer. Length or brevity (c) of the answer should not determine its veracity. Never "always choose" a certain answer (d), there is no evidence that supports this increasing your odds if more correct answers.