Research Done by ShopLocal

Research done by ShopLocal.com found that Americans today are concerned enough about sustaining the environment that they are willing to spend more.Suppose that to cut the cost of the research,ShopLocal.com included a second study asking consumers about their preferences in the upcoming presidential elections.This research would be an example of:

A) a dual-purpose analysis
B) a piggyback study
C) a Siamese twin project
D) a two-for-one integrative study
E) dual experimentation