Option A - INCORRECT.
Whether there are more collared female rhinoceroses than un-collared female rhinoceroses in the park still does not justify the fact that the use of collar on female rhinoceroses puts them at risk to inhibit infertility and if it is continues like this it will also get to the turn of the un-collared ones too on day since that's the only device use in tracking them.

Option B - INCORRECT.
There is every possibility that, if the tranquilizer that is used for immobilizing rhinoceroses if at all is same tranquilizers used in working with other large mammals, then they will all face the same issue of infertility.

Option C - CORRECT.
After a critical evaluation of the probability of the cause of the infertility of the female rhinoceroses, it is necessary to know how often park rangers need to use tranquilizer darts to immobilize rhinoceroses for reasons other than attaching radio collars. Also, if it is possible for rangers to do without shooting the tranquilizer dart to re-immobilize the animal since its affecting the female rhinoceroses.


Option D - INCORRECT.
Whether male rhinoceroses in the wildlife park lose their collars any more often than the park's female rhinoceroses is not the born of contention in this argument. The main reason for this evaluation is the inhibit infertility noticed on female rhinoceroses when recollared.


Option E - INCORRECT.
The statement in this option is also true and needs to be answered to know if radio collars are the only tracking device available or there are alternative means of tracking rhinoceroses especially the females.