After Learning to Press Five Keys,"A" Through "E," in Alphabetical

Multiple Choice

After learning to press five keys,"A" through "E," in alphabetical order,monkeys were given tests in which subsets of two keys were presented.A comparison of the latencies to press the second key revealed that as the number of letters missing between the two test keys increased,(BD) versus (BE) for example,the latency to press the second key _____,suggesting that the monkeys were using mental scanning to perform the task.

A) remained the same
B) increased
C) decreased
D) increased if the first key was "A" or "B," and decreased if the first key was "C" or "D" ("E" could not be the first key)