Which/who of the following was NOT an opponent to rechartering either the First or the Second Banks of the United States?

The goods or services that firms in an oligopoly sell:

A. are standardized. B. are not close substitutes. C. are either standardized or close substitutes. D. are close substitutes.

In Figure 5.4, a monopolist would charge which price? 

A. P1 B. P2 C. P3 D. P4