Recall the Application ʺMerck and Pfizer Go Generic?ʺ Which of the Following

Recall the Application ʺMerck and Pfizer Go Generic?ʺ Which of the following best represents the way Merck responded to the increased competition?

A) Merck aggressively raised its prices for generics.
B) Merck used the entry deterrence of undercutting prices of its generics.
C) Merck used the entry deterrence of overpricing its branded drugs.
D) Merck lobbied the government to extend the patents.