If the Price Charged for a Candy Bar Is $p(x)$ Cents, Then

Multiple Choice

If the price charged for a candy bar is $p(x)$ cents, then $x$ thousand candy bars will be sold in a certain city, where $\mathrm{p}(\mathrm{x}) =49-\frac{\mathrm{x}}{20}$ . How many candy bars must be sold to maximize revenue?

A) 490 thousand candy bars
B) 980 thousand candy bars
C) 980 candy bars
D) 490 candy bars