Smith and Blankenship gave participants problems to solve and provided clues. One group was forced to take a break after only 60 seconds of working on the problem. After a 30-second break, they were given another 30 seconds to try to solve the problem. Compared to the group that did not get the break, the incubation group
a) performed worse on the problem-solving task.
b) solved the problems faster.
c) remembered more of the clues.
d) remembered fewer clues.