Use the Following to Answer Questions -(Table: Demand for Lenny's Coffee)Use Table: Demand for Lenny's Coffee

Use the following to answer questions : $$\begin{array}{l}\text { Table: Demand for Lenny's Coffee }\\\begin{array} { c c } \hline \begin{array} { l } \text { Price } \\\text { of Coffee } \\\text { (per cup) }\end{array} & \begin{array} { c } \text { Quantity } \\\text { of Coffee } \\\text { Sold (daily cups) }\end{array} \\\hline \$ 10 & 0 \\9 & 1 \\8 & 2 \\7 & 3 \\6 & 4 \\5 & 5 \\4 & 6 \\3 & 7 \\2 & 8 \\1 & 9 \\0 & 10 \\\hline\end{array}\end{array}$$
-(Table: Demand for Lenny's Coffee) Use Table: Demand for Lenny's Coffee.Lenny's Café is the only source of coffee for hundreds of kilometres in any direction.If Lenny's marginal cost of selling coffee is a constant $2,his profit-maximizing level of output is _____ cups at _____ per cup.

A) 4;$6
B) 8;$3
C) 5;$5
D) 3;$7