In a certain wildlife park, park rangers are able to track the movements of many rhinoceroses because those animals wear radio collars. when, as often happens, a collar slips off, it is put back on. putting a collar on a rhinoceros involves immobilizing the animal by shooting it with a tranquilizer dart. female rhinoceroses that have been frequently recollared have significantly lower fertility rates than uncollared females. probably, therefore, some substance in the tranquilizer inhibits fertility. in evaluating the argument, it would be most useful to determine which of the following? (a) whether there are more collared female rhinoceroses than uncollared female rhinoceroses in the park. (b) how the tranquilizer that is used for immobilizing rhinoceroses differs, if at all, from tranquilizers used in working with other large mammals (c) how often park rangers need to use tranquilizer darts to immobilize rhinoceroses for reasons other than attaching radio collars (d) whether male rhinoceroses in the wildlife park lose their collars any more often than the park’s female rhinoceroses do (e) whether radio collars are the only practical means that park rangers have for tracking the movements of rhinoceroses in the park

E. Weather radio collars are the only practical means that park rangers have for tracking the movement of the rhinoceros in the park.

Explanation:

E. Weather radio collars are the only practical means that park rangers have for tracking the movement of the rhinoceros in the park.

Nowadays there is a lot of technology available for tracking and monitoring of wildlife in big areas. If these radio collars are falling off very frequently and the tranquilizer is being used a lot, it means the method they are using is not the best or very efficient for this type of big animals.

They can use for example GPS trackers in a microchip implanted below the rhinoceroses skin or even inside the horn. With this process the park rangers would just need to use the tranquilizer once to immobilize the animal for a little bit, implant the GPS tracker or microchip; this device won't fall or slip off and won't do any harm to the rhinos either. This procedure will reduce the risk of the collar falling off and the use of the tranquilizer every time it does fall. Additionally, with this trackers, the park rangers, supervisor or vet can access the information 24 hours a day, in real-time from a computer or even an electronic device. This new technology even offers an alarm systems by SMS or calls every time an abnormal rhino activity is detected.  

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