Hi! 
The word straits, in this case, means a troubling situation. It is a synonym with the word crisis, therefore i believe your answer is B. Crisis
Hope this helps :)
        
             
        
        
        
I’ll say honesty for this type of question
        
             
        
        
        
If one of the students left their book on the table then ask all of the student if they left a book on the table.
 
        
             
        
        
        
it is foreshadowing since the clocks where seen in the beginning and then showed up later in the movie.