The subject of the sentence is b. you~
Answer:
Can you further explain how to answer this question
Explanation:
It looks like these are just options for a question
Without having the passage, I can only help you to find it on your own. While you read the entire passage, what detail are you reading that supports that national parks are in need of coordinated administration from professionals of the preserves? You have only stated 'detail', so I am assuming they are only asking for one; therefore, you need to look for some type of factual statement to support the sentence.
