How to disinfect drinking water in the wilderness<br>Pack the proper water purifying equipment and chemicals. If you're backpacking you should have a high quality pump with a filter, and/or purifying tablets. Immerse the end of the pump where water flows in in the clearest portion of the water source that you can see.
Can we infer the following?
You should use the pump multiple times to disinfect the same water.

Possible answers: (i). Yes (ii). It's impossible to say (iii). No
The answer is:
(ii).