When Marty Attended His First New Product Development Class,he Realized

When Marty attended his first new product development class,he realized that he ought to have an AutoCAD type software program to enable him to do proper designs or else he would be unable to do his assignments.In which stage of the consumer purchase decision process was Marty when he made this realization?

A) information search
B) problem recognition
C) purchase behaviour
D) alternative evaluation