The Reason Airbus Succeeded in the Brander Spencer Example Is

The reason Airbus succeeded in the Brander Spencer example is that

A) Boeing made the first move in this strategic game.
B) Europeans tend to be better strategists than corn-fed Americans.
C) the Airbus actually was a better plane than the Boeing 747.
D) U.S. laws actually prohibit U.S. exporters from bribing foreign officials.
E) the subsidy removed the advantage that Boeing gained with their head start in production.