The Main Reason for the Current Trend Toward a Growing

The main reason for the current trend toward a growing spirit of cooperation between unions and management is

A) that there is significant union presence on corporate boards of directors.
B) that about half of all American workers now belong to unions, so management is more inclined to listen.
C) the lack of urgency in meeting demands, since most workers now enjoy comfortable wages and working conditions.
D) a desire to survive in a highly competitive economy under increasing pressure from foreign competition.
E) the passage of new federal labor laws that now require cooperation under threat of federal intervention.