When collecting condensation for drinking water，（）.<br>A:a sponge used to mop up and store condensation must be kept salt free<br>B:only condensation on the bottom of the canopy should be collected<br>C:it should be strained through a finely woven cloth<br>D:chlorine tablets should be used to make it drinkable

When collecting condensation for drinking water，（）.
A:a sponge used to mop up and store condensation must be kept salt free
B:only condensation on the bottom of the canopy should be collected
C:it should be strained through a finely woven cloth
D:chlorine tablets should be used to make it drinkable

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