Which of the following, if true, most logically completes the argument? A. the source of the spiders' drinking water is not rainwater but morning dew B. spiders would not make structures as energy-consuming as the stabilimenta are unless those structures conferred some benefit on the spiders C. the role of stabilimenta in collecting drinking water was discovered independently of attempts to verify the reinforcement hypothesis D. a spider web designed to trap rather than shed water needs to be structurally stronger than one that sheds water E. the threads that make up the stabilimenta are as strong as the threads that make up the rest of the web.