If a monopolist can sell 9 units at price of $100 per unit and 10 units at a price of $90 per unit, its marginal revenue at an output of 10 units is
A) $-90.
B) $0.
C) $90.
D) $100.

Question

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The Answer of If a monopolist can sell 9 units at price of $100 per unit and 10 units at a price of $90 per unit, its marginal revenue at an output of 10 units is
A) $-90.
B) $0.
C) $90.
D) $100.

If a Monopolist Can Sell 9 Units at Price of $100