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.
Answer:
its b
Explanation:
the other person just did it for points but a thesis is a short statement on whatever your writing about
The army is one part of the gov.
Depends on the plot but the last one