National Fruit Company makes "WhiteHouse" apple juice. Market research determined that the company needed to mold its bottle so as to make it easier to grasp. Its market research would have been conducted by a(n) _____, and its packaging changes would have been done by a(n) _____.
A. specialized service; interactive agency
B. interactive agency; collateral service
C. collateral service; specialized service
D. interactive service; creative boutique
E. collateral service; collateral service
Answer: E