Which of the Following Is True of Extended Problem Solving

Which of the following is true of extended problem solving?

A) It refers to the internal conflict that arises from an inconsistency between two beliefs, or between beliefs and behaviour.
B) It refers to a buying decision made by customers on the spot when they see the merchandise.
C) It refers to a purchase decision process in which consumers engage with little conscious effort.
D) It refers to a purchase decision process during which consumers devote, at most, a moderate amount of effort and time.
E) It refers to a purchase decision process during which consumers devote considerable time and effort to analyzing alternatives.