What can be inferred from paragraph 4 about the trumpeting of bull elk? A. Trumpeting by higher-status bull elk signals their presence to other members of their species. B. Bull elk need to combine trumpeting with olfactory signals to convey information about their identity. C. Trumpeting alerts white-tailed deer to the presence of bull elk in their vicinity. D. Trumpeting provides a better measure of deer presence in a given area than buck rubs do.