I think it's D. Just think about it, use the process of elimination.
The sentence missing an apostrophe for a contraction is Sentence 9.
Sadly, even after that water is found, only some of its clean and safe enough to drink.
"its" should be "it's"
A short way of written and spoken forms of a word, syllable, or word group, created by omission of internal letters and sounds is called Contraction.
Yes it makes sense but the wording is a little strange maybe rearrange it a little.
