A Manager in Charge of New Product Development Can Hire

A manager in charge of new product development can hire engineers and market researchers. The annual salary of an engineer is $30,000 and that of a market researcher is $20,000. The marginal contribution of engineers and market researchers are

$\begin{array}{cccc}\text { Engineers }(E) &&\text { Market Researchers }(R) \\&\text { Additional }&&\text { Additional }\\\text { Worker } & \text { NewProducts } & \text { Worker } & \text { NewProducts }\\1^{\text {st }} & 50 & 1^{\text {st }} & 30 \\2^{\text {nd }} & 30 & 2^{\text {nd }} & 25 \\3^{\text {rd }} & 15 & 3^{\text {rd }} & 20 \\4^{\text {th }} & 10 & 4^{\text {th }} & 15 \\5^{\text {th }} & 8 & 5^{\text {th }} & 10\end{array}$
-If the manager currently has two engineers and one market researcher, what must be true?

A) He is making the correct decision because
B) He is not making the correct decision because
C) Fewer new products will be developed if he hires fewer engineers and more market researchers.
D) More new products will be developed if he hires fewer engineers and more market researchers.