GRE Text Completion: JiJing 1373-GRE填空机经1373题 - 9I07T7BHSZ7095ZOA

Wilson is wont to emphasize the ____________ of ants, how ants with full stomachs will regurgitate liquid food for those without, or how the old will fight so the young can survive. A. beneficence B. altruism C. unpredictability D. intelligence E. fecundity F. fertility