Answer:
According to Dr. James Peterman, "It is extremely important to drink enough [water] every single day."
Explanation:
The third option should contain brackets instead of parentheses.
Parentheses are punctuational marks we use to introduce an additional thought about a statement. Unlike them, brackets are used to introduce information of a technical nature or information added by the editor. Words in brackets are added to clarify the rest of the sentence but can be omitted without affecting its meaning.
This is the case in the given sentence. The writer wanted to clarify that Dr. James Peterman is talking about water and not something else, like alcohol.
This is why the third option is the correct one.
