Which is a memory strategy?

A. Review information shortly after you've learned it.

B. Memorize every fact.

C. Let information sink in by studying just before tests.

D. Study alone to avoid distractions.

Letter A is the answer first because it's an effective strategy proven by studies and general knowledge. Reinforcing a certain piece of information successively within short intervals of time (while it's still 'fresh' in your mind) turns it from short-term memory into long-term memory!

Moreover, taking a look at the other options:

Letter B doesn't even make sense to what was asked by the question, as memorizing every single thing can't even be considered a strategy.

Letter C, in contradiction to letter A, has proven to be a very non-effective strategy, being even responsible for making students stressed before the exams and frustrated after them, for not achieving good results.

And finally, letter D varies from student to student. For some, it works, for others not so much. Therefore it isn't considered a general strategy.