Mantyla's "banana / yellow, bunches, edible" experiment demonstrates that, for best memory performance, retrieval cues should be created a.

Mantyla’s “banana / yellow, bunches, edible” experiment demonstrates that, for best memory performance, retrieval cues should be created

a.   by agreement among many people, thus providing proof they are effective.

b.   by a memory expert who understands what makes cues effective.

c.   using visual images.

d.   by the person whose memory will be tested.