Economics Questions Micro

Multiple Choice 

Question: Suppose that Coke and Pepsi, two soft drink manufacturers, agree to charge the same prices for their soft drinks. This practice would

A)always be legal under the antitrust laws.
B)be legal if the Herfindahl-Hirschman index for the soft drink market is less than 1,000. be legal as long as the firms had C) a cost justification for setting prices.
D)be legal if otherwise Pepsi would go bankrupt.
E)always be illegal under the antitrust laws.