William Has Been Working Diligently on an Engineering Project, but He

Multiple Choice

William has been working diligently on an engineering project, but he has gotten to the point that he sees no way to a viable solution. So, he sets aside the problem and works on another project. By setting aside the problem, William is allowing problem-solving to proceed on a subconscious level. This stage of creative thinking is known as

A) incubation.
B) illumination.
C) preparation.
D) verification.