Archimedes Was Asked by the King to Determine Whether the Goldsmith

Archimedes was asked by the king to determine whether the goldsmith in making his crown had cheated the king by substituting cheaper metals.In order to solve this problem, Archimedes first defined the problem and then checked all the known methods for analyzing metals.When he found that all the known methods involved cutting or melting the crown, he was forced to temporarily set the problem aside.This stage of creative thought in which the problem is set aside for awhile is known as

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