It Was Starting to Rain,and Marcus Did Not Have an Umbrella

Multiple Choice

It was starting to rain,and Marcus did not have an umbrella or a hat.To keep dry,he held his psychology textbook over his head.In this case,Marcus

A) has solved the problem using the hill-climbing heuristic.
B) has solved the problem by using functional fixedness.
C) has managed to overcome functional fixedness.
D) has better defined his problem-solving set.