A. There should be an apostrophe on the it's, because it is saying, "only some of it is clean and safe enough to drink." The apostrophe should be on that word because it breaks the word down into it is, which is correct in the sentence.
Where is the excerpt? If you could let me see it I could help you.
D.narrative
hope this helps if it does remember to give me a like , good luck!
Answer:
No, but some people think yes.
Explanation: