In One of His Studies, Karl Duncker Asked Students to Mount

Multiple Choice

In one of his studies, Karl Duncker asked students to mount a candle on a vertical board so the candle could burn normally. The students who saw the box in which the materials were presented as only a container rather than as a part of the solution were exhibiting

A) mental consolidation.
B) functional fixedness.
C) retroactive interference.
D) cognitive dissonance.