How to clean a sink drain<br>Remove your drain cover. Remove any covers that are on top of your drain. If you have a pop-up drain stopper, turn the cover counter-clockwise to remove it from the drain.

Choose your answer: based on the paragraph above can we conclude that "pop-up drain stopper must be removed"?

Choices: [I] Yes [II] It's impossible to say [III] No
I think the answer is
[I]