Answer the Question on the Basis of the Following Information $\begin{array} { c c } \text { Input Quantity } & \text { Real Domestic Output } \\100 & 200 \\150 & 300 \\200 & 400\end{array}$

Multiple Choice

Answer the question on the basis of the following information about the relationship between input quantities and real domestic output in a hypothetical economy: $\begin{array} { c c } \text { Input Quantity } & \text { Real Domestic Output } \\100 & 200 \\150 & 300 \\200 & 400\end{array}$ Refer to the table.If the price of each input is $5,the per-unit cost of production in the economy is:

A) $5.
B) $2.75.
C) $2.50.
D) $.40.