A Group of Participants Is Interrupted While Working on a Problem

A group of participants is interrupted while working on a problem. The participants then spend some time on an unrelated task, and, finally, they return to the initial problem. Studies of this sort show that the:

A) participants will benefit from the interruption and are more likely to solve the problem when they return to it
B) participants will be disrupted by the interruption and are less likely to solve the problem when they return to it
C) participants will not be affected by the interruption
D) data are mixed, with some studies showing a benefit from the interruption but with many studies showing no effect