If, in a Monopoly Market, the Demand for a Product

If, in a monopoly market, the demand for a product is , and the revenue function is , where x is the number of units sold, what price will maximize revenue? Round your answer to the nearest cent. ​

A) Price that will maximize revenue is
)
B) Price that will maximize revenue is
)
C) Price that will maximize revenue is
)
D) Price that will maximize revenue is
)
E) Price that will maximize revenue is
)