Since a rhinoceros that has no horn is worthless to poachers, the Wildlife Protection Committee plans to protect selected rhinoceroses from being killed by poachers by cutting off the rhinos’ horns.
The Wildlife Protection Committee’s plan assumes that
A．poachers do not kill rhinos that are worthless to them.
B．hornless rhinos pose less of a threat to humans, including poachers, than do rhinos that have horns.
C．rhinos are the only animals poachers kill for their horns.
D．hornless rhinos can successfully defend their young against nonhuman predators.
E．(E) imposing more stringent penalties on poachers will not decrease the number of rhinos killed by poachers.