Answer:
The subject was dropped, but it was clear that it would be brought up again.
Explanation:
The options you were given are the following:
The most precise and concise way to rewrite the given sentence is the first one: The subject was dropped, but it was clear that it would be brought up again.
A concise sentence is a sentence written in a direct, clear manner, using the fewest words possible. The longer the sentence is, the harder it is to understand it. This is why we should try to keep our sentences as short and direct as possible.