Both answers are correct, so you’re good
A predicate adjective is the first adjective that follows a linking verb which connects two parts of a sentence (in this case, that verb is 'was'). So, the first adjective after was is 'sleek', so D is the correct answer.
Third person because that is when you find the consequence of the situation.
Answer:
She wants him to help Mr. Juarez because he has been a good neighbor to her and her family.
