In the Early Trucking Studies by Morton Deutsch and Robert

In the early trucking studies by Morton Deutsch and Robert Krauss (1960,1962) ,it was found that allowing the competing participants to communicate during the game

A) increased the profits for the participant that could wield threats.
B) distracted the participants from the goal of the game.
C) raised the profits gained for each participant by a large margin.
D) did not foster trust and cooperation.
E) increased trust and cooperation dramatically.