Table 5-2 -Refer to Table 5-2

Table 5-2
$$\begin{array} { | l | l | } \hline \text { Priea } & \text { Quintit } \\\hline \$ 100 & 0 \\\hline \$ 80 & 10 \\\hline \$ 60 & 20 \\\hline \$ 40 & 30 \\\hline \$ 20 & 40 \\\hline \$ 0 & 50 \\\hline\end{array}$$
-Refer to Table 5-2. Using the midpoint method, if the price falls from $60 to $40, the absolute value of the price elasticity of demand is

A) 0.4.
B) 1.
C) 4.
D) 20.