De Lisi and Staudt Compared the Formal Operational Reasoning Skills

De Lisi and Staudt compared the formal operational reasoning skills of physics, English, and political science majors on tasks involving physics, literary analysis, and political concepts and found that

A) performance of the groups did not vary across tasks.
B) subjects showed the most sophisticated reasoning on the task that most closely matched their interests.
C) all groups performed worst on the physics problem.
D) the political science majors performed the worst on all problems.