In a Classic Study by Deutsch and Krauss (1960) Participants

In a classic study by Deutsch and Krauss (1960) participants imagined that they were the owners of two rival truck companies, Acme and Bolt, whose profits were based upon the speed with which they carried merchandise over roads to specific destinations. In which condition did both participants make the most money?

A) When both Acme and Bolt were able to control when a gate closed over the central road.
B) When only Acme had control over a gate that closed over the central road.
C) When only Bolt had control over a gate that closed over Acme's alternate route.
D) When neither Acme nor Bolt had control over a gate.