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.
Premise - a rhinoceros that has no horn is worthless to poachers,
Conclusion - the WPC plans to protect selected rhinoceroses from getting 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 -
CORRECT, if we negate this it will falsify our conclusion of protecting rhino from getting killed by poachers(B) hornless rhinos pose less of a threat to humans, including poachers, than do rhinos that have horns -
IRRELEVANT, posing more or less threat is not the context(C) rhinos are the only animals poachers kill for their horns -
OUT OF SCOPE, Other Animals are not relevant(D) hornless rhinos can successfully defend their young against nonhuman predators -
IRRELEVANT whether hornless rhinos can defend themselves or not is out of context(E) imposing more stringent penalties on poachers will not decrease the number of rhinos killed by poachers -
OUT OF SCOPE, imposing penalties on poachers is nowhere mentioned in the passageKindly give kudos if my explanation helped