What Are People Doing If a Mental Set Interferes with Problem

Multiple Choice

What are people doing if a mental set interferes with problem solving?

A) They place an unnecessary constraint on the solution to a problem.
B) They assume that all the information provided in a problem is necessary to solve the problem.
C) They perceive an item only in terms of its most common use.
D) They persist in using problem-solving strategies that have worked in the past.