Josh Is Eating Pizza at His Favorite Italian Restaurant Refer to Table 19

Josh is eating pizza at his favorite Italian restaurant.Below is his utility from this consumption: Table 19.1
$\begin{array}{|l|c|c|}\hline{\text { Slice of Pizza }} & \text { Total Utility } & \text { Marginal Utility } \\\hline \text { First slice } & 20 & 20 \\\hline \text { Second slice } & 39 & 19 \\\hline \text { Third slice } & - & 15 \\\hline \text { Fourth slice } & 59 & - \\\hline\end{array}$ Refer to Table 19.1.For Josh,diminishing marginal utility begins

A) After the first slice of pizza.
B) After the third slice of pizza.
C) After the second slice of pizza.
D) To increase after the first slice of pizza.