Britney Believes That Exposure to Violent Television Increases Aggressive Behavior

Britney believes that exposure to violent television increases aggressive behavior by making people's own aggressive thoughts more accessible. Christina believes that violent television increases aggressive behavior by impairing people's cognitive abilities, which in turn makes them worry less about the consequences of their behavior as well as more likely to have aggressive thoughts. If we knew that violent television indeed increases aggressive behavior but knew nothing else on this topic, which of the following two theories should we prefer?

A) Christina's, because it is more empirical than Britney's
B) Britney's, because it is more efficient than Christina's
C) Christina's, because it is more testable than Britney's
D) Britney's, because it is more testable than Christina's