It’s the second third and last box
For indicating time, the best answer is C- During, because this word tells a reader when an action is taking place.
Again implies that something has been done before, and is being done again, but does not imply <em>when</em> it is being re-done.
Furthermore is a word with a similar meaning to "Also", so it is not connected to the idea of time.
Besides generally means "other than" which, again, has no connection to time.
The answer would be Vocab Words to your question
They need to stay hidden and keep meeting in secret sense their families are against eachother (I believe so)