Refer to the Accompanying Figure A)-5
B)0

Multiple Choice

Refer to the accompanying figure. The marginal utility of the 5?? apple is:  
$$\begin{array} { | c | c | } \hline \text { Number of Apples } & \begin{array} { c } \text { Tatal } \\\text { Utility }\end{array} \\\hline 1 & 20\\\hline 2 & 35 \\\hline 3 & 45 \\\hline 4 & 50 \\\hline 5 & 45 \\\hline\end{array}$$

A) -5.
B) 0.
C) 5.
D) 45.