Whats the story ?? maybe try adding an image :)
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.
We will wash the wheels with water whenever we can.
Alliteration in the repetition of a sound or letter. In this case, I repeated the 'w' in the sentence.
Hope this helps! :)
The answer to this question is c