Exhibit 6-1 Total Utility for Good X -As Shown in Exhibit 6-1, the Law of Diminishing Marginal

Multiple Choice

Exhibit 6-1 Total utility for good X $$\begin{array} { | l | r | r | r | r | r | r | } \hline \text { Total utility (utils) } & 0 & 80 & 120 & 148 & 160 & 155 \\\hline \text { Quantity con sumed per day } & 0 & 1 & 2 & 3 & 4 & 5 \\\hline\end{array}$$
-As shown in Exhibit 6-1, the law of diminishing marginal utility is first observed at the:

A) first unit.
B) second unit.
C) third unit.
D) fourth unit.
E) fifth unit.