Functional fixedness is a special case of the:

A) base-rate information effect.
B) framing effect.
C) sunk cost effect.
D) confirmation bias.

Functional Fixedness

A cognitive bias that limits a person's ability to use an object only in the way it is traditionally used.

Confirmation Bias

The habit of looking for, interpreting, prioritizing, and recalling data in a way that reinforces one's already held convictions or assumptions.