A Period of Several Decades,coffee Consumption Declined from 75 Percent

a period of several decades,coffee consumption declined from 75 percent of the adult population in 1962 to 49 percent in 2004.Then,it increased to 56 percent in 2010.A firm with a good marketing orientation would have

A) found a less volatile product to sell.
B) invested more money into market research.
C) changed to a new promotional firm.
D) explored the reasons behind these changes.
E) demoted coffee from being a "star" to a "dog."