B. ( A Static Character is one that does not undergo important change in the course of the story, remaining essentially the same at the end as he or she was at the beginning.)
        
                    
             
        
        
        
Answer:
Held Up
Explanation:  If we take each option and place it in the blank of the sentence, we can see which one makes the most sense.
A. The train was <em>held back</em> by a heavy snowfall.
B. The train was <em>held out </em>by a heavy snowfall.
C. The train was <em>held off </em>by a heavy snowfall.
D. The train was <u>held up</u> by a heavy snowfall.