Molly Ann, a Clothing Company, Is Unable to Improve Sales

Molly Ann, a clothing company, is unable to improve sales after its designer failed to create designs that satisfied current trends in the market.Rigby, on the other hand, is having a successful season and its designs are the current rage in the market.After a careful study of Rigby's designs, Molly Ann analyzed them, improved upon them, and created a whole new range of designs.The method of idea generation being used by Molly Ann is:

A) concept testing.
B) alpha testing.
C) prototyping.
D) brainstorming.
E) reverse engineering.