Alex Was Being a Shown a Sequence of Objects Which

Alex was being a shown a sequence of objects which were of the same size and they all resembled a square.After sometime Alex lost interest in those objects.When they showed him a triangular object it suddenly caught his attention and he started looking at those objects again.This change in response in Alex is referred to as _____.

A) sustained attention
B) orientation
C) dishabituation
D) visual preference