After Consuming What Quantity of Pizza Does the Consumer in the Table

Multiple Choice

After consuming what quantity of pizza does the consumer in the table below experience diminishing marginal utility? $$\begin{array} { c c } \begin{array} { c } \text { Quantity } \\\text { of Pizza }\end{array} & \begin{array} { c } \text { Marginal Utility } \\\text { of Pizza }\end{array} \\\hline 1 & 100 \\2 & 80 \\3 & 60 \\4 & 40 \\\hline\end{array}$$

A) 1
B) 2
C) 3
D) 4