The Figures Given Below Represent the Revenue Curves of a Monopolist

The figures given below represent the revenue curves of a monopolist. Figure 10.2 TR: Total revenue curve
AR: Average revenue curve
MR: Marginal revenue curve
Refer to Figure 10.2.In order to maximize profits, what quantity should the monopolist produce?

A) B
B) E
C) Between B and E
D) Impossible to determine because we are not given the cost curves.
E) Impossible to determine because we are not given the demand curve.