Which of the following is an assumption on which the argument depends? A. Researchers were interested only in observing the wetas' foraging habits and so did not keep track of other types of behavior. B. No pattern of behavior that is exhibited by wetas during the nighttime is also exhibited by wetas during the daytime. C. Attaching the small lights to the wetas' backs did not greatly alter the wetas' normal nighttime foraging habits. D. Wetas typically forage more frequently during the months in which the researchers studied them than they do at other times. E. The researchers did not use other observational techniques to supplement their method of using small lights to track the nighttime behavior of wetas.