Answer:
That
Explanation:
Who, Which, When, Whose, That, Where are 6 of your basic relative pronouns
The boy eats and drinks the milk and cookies that he knows he cannot pay for.
The answer to this question is A
I'm not sure but here's the definition of Parallel Structure. ( Using the same pattern of words to show that two or more ideas have the same level of importance). You can go with either the first or second sentence that's my opinion but I'm really not 100% sure. Sorry I couldn't been more helpful. I tried