Refer to the Accompanying Table A)constant

Multiple Choice

Refer to the accompanying table. The marginal utility of consuming apples 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) constant.
B) first increasing, but decreasing after the fourth apple.
C) decreasing after the first apple.
D) constantly increasing.