In Roberts et al.'s (2006) experimental test of the hypothesis that male wolf spiders use the behavior of nearby males to find receptive females, what did they compare?

A) The behavior of a male before and after the presentation of a stimulus
B) The behavior of a male after the presentation of a stimulus
C) The presentation of visual cues only
D) The presentation of seismic cues only
E) There was no control in the experiment