Assume that the competition between Boeing and Airbus can be characterized by the following matrix where the first number in each cell denotes the

Assume that the competition between Boeing and Airbus can be characterized by the following matrix

where the first number in each cell denotes the payoff that Boeing receives and the second number is the payoff that Airbus receives. Then a subsidy of 10 provided to Boeing by the US government will

change nothing

will increase US welfare

will negatively affect US welfare

result in both firms leaving the market