Consider the following prisoner's dilemma with the payoff matrix (Numbers represents years in prison): Person B Do not contribute Contribute Person A Do not contribute A pays $0, receives $0, A pays $0, receives net gain $0 $21, net gain $21 B pays $0, receives $0, B pays $28, receives net gain $0 $21, net gain $-7 Contribute A pays $28, receives $42, net gain $14 A pays $28, receives $21, net gain $-7 B pays $0, receives $21, net gain $21 B pays $28, receives $42, net gain $14 1. What is the dominant strategy for player A? a. Contribute. b. Do not contribute. c. There is no dominant strategy.