College Students,who Have Experienced Unsolvable Problems,when Faced with New Problems,eventually

College students,who have experienced unsolvable problems,when faced with new problems,eventually give up and make only half-hearted attempts to solve the new problems,even when these problems can be solved.This behaviour is probably due to:

A) learned helplessness.
B) operant learning.
C) latent learning.
D) response generalization.