Which of these transition words would be appropriate for indicating time?   a.  again  b.  furthermore  c.  during  d.  besides

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 when 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. 

What details from the story develop this theme