Tom is studying for his first psychology exam. What should he do to ensure he remembers all he studied?

a. Begin studying many days in advance to give his brain time to commit the material to memory and repeatedly test his retrieval of information.

b. Memorize as much of the information as possible.

c. Study all night long before the exam—he can sleep after the test.

d. Wait to study until just before the scheduled exam, so that the information will be fresh in his mind.