Complete Table 19 Table $19.2$ Utility Schedule in Table 19

Multiple Choice

Complete Table 19.2 below:
$\begin{array}{lll}\text { Quantity } & \text { Total } & \text { Marginal } \\\text { Consumed } & \text { Utility } & \text { Utility }\\1 & 15 & 15 \\2 & -& 9 \\3 &30 & - \\4 & -& 3\end{array}$
Table $19.2$
Utility Schedule In Table 19.2, the marginal utility of the third unit is

A) 3.
B) 5.
C) 6.
D) 30.