(Table) According to the Table, the Monopolist's Marginal Revenue on the Fifth

Multiple Choice

(Table) According to the table, the monopolist's marginal revenue on the fifth unit of output is
$\begin{array}{|c|c|}\hline \mathbf{Q} & \mathbf{P} \\\hline 0 & 20 \\\hline 1 & 18 \\\hline 2 & 16 \\\hline 3 & 13 \\\hline 4 & 10 \\\hline 5 & 7 \\\hline 6 & 4 \\\hline\end{array}$

A) $35.
B) -$5.
C) -$11.
D) $40.