Jada keeps spanking her children when they misbehave, even though it is obvious that this is not an effective form of punishment for her children. Why does Jada keep spanking?

a. She has a mental set.
b. She is working backward.
c. She is demonstrating anchoring bias.
d. She is identifying the problem.
e. She is demonstrating divergent thinking.

a. She has a mental set.