Question ID:PT29 S4 Q11 Passage:Sometimes when their trainer gives the hand signal for "Do something creative together," two dolphins circle a pool in tandem and then leap through the air simultaneously. On other occasions the same signal elicits synchronized backward swims or tail-waving. These behaviors are not simply learned responses to a given stimulus. Rather, dolphins are capable of higher cognitive functions that may include the use of language and forethought. Stem:Which one of the following, if true, most strengthens the argument? Correct Answer Choice:BChoice A:Mammals have some resemblance to one another with respect to bodily function and brain structure. Choice B:The dolphins often exhibit complex new responses to the hand signal. Choice C:The dolphins are given food incentives as part of their training. Choice D:Dolphins do not interact with humans the way they interact with one another. Choice E:Some of the behaviors mentioned are exhibited by dolphins in their natural habitat.