When collecting condensation for drinking water, __________.

Correct Answer: Option A — a sponge used to mop up and store condensation must be kept salt free

When collecting condensation for drinking water, maintaining the purity of the collection medium is vital. A sponge used for this purpose must be kept strictly salt-free, as any residual salt will contaminate the collected water, rendering it unsafe or unpalatable for consumption during a survival situation.