Refer to the Following Table Showing a Monopolist's Demand Schedule $$\begin{array} { c c } \text { Price } & \text { Quantity } \\\hline \$ 50 & 300 \\40 & 600 \\20 & \text { 800 } \\10 & 1,000\end{array}$$

Multiple Choice

Refer to the following table showing a monopolist's demand schedule: $$\begin{array} { c c } \text { Price } & \text { Quantity } \\\hline \$ 50 & 300 \\40 & 600 \\20 & \text { 800 } \\10 & 1,000\end{array}$$ If price falls from $20 to $10,then

A) MR = -$10,and demand is inelastic.
B) MR = $10,and demand is elastic.
C) MR = $30,and demand is elastic.
D) MR = -$30,and demand is inelastic.
E) none of the above