A Single Firm That Charges the Monopoly Price in the Market

Multiple Choice

A single firm that charges the monopoly price in the market earns $800.If another firm successfully enters the market,the incumbent's profits fall to $500 and the entrant earns $450.If the incumbent engages in limit pricing,its profits are $600.For what interest rate,i,is limit pricing a profitable strategy for the incumbent?

A) i < 0.5
B) 0.5 < i < 1.0
C) 1.0 < i < 1.5
D) i > 1.5