It Is Difficult to Predict What an Individual Will Remember

It is difficult to predict what an individual will remember for all of the following reasons EXCEPT:

A) Individuals will engage in a variety of mnemonic techniques, some more successful than others.
B) Memory acquisition depends on previous knowledge, and everyone has different knowledge.
C) Encoding strategies should be adjusted to match testing strategies, but individuals do not always know what the testing strategy will be.
D) It is difficult to test memory.