Assume a monopolist sells its product or service for the same price to all buyers. Also assume that the monopolist lowers its price to increase unit sales (i.e. output). We know that if the price effect associated with an increase in output exceeds the quantity effect,
A) then marginal revenue must be positive
B) then marginal revenue must be equal to zero
C) then marginal revenue must be negative
D) there is not sufficient information to answer this question