Table 192 In Table 19

Table 19.2 $\begin{array}{c}\begin{array}{|c|}\hline\text { Quantity Consumed }\\\hline1 \\\hline 2 \\\hline 3 \\\hline 4\\\hline\end{array}\begin{array}{c|}\hline\text { Total Utility}\\\hline15\\\hline\\\hline30\\\hline\\\hline\end{array}\begin{array}{c|}\hline\text { Marginal Utility}\\\hline15\\\hline9\\\hline\\\hline3\\\hline\end{array}\end{array}$

In Table 19.2,the total utility when two units are consumed is

A) 6.
B) 9.
C) 15.
D) 24.