Read the following context and choose the best option to answer the question.
Context: Everything was metal , and there was no mattress . He got up to open the door , and found it locked or blocked or something from the other side . That meant , then , that someone played a trick on him . He almost took his shirt off and set fire to that , but he needed the warmth it provided , scant as it was . So , instead , he banged on the door .
Question: Why is burning his shirt impractical in this situation ?
Options: 
A. He is not wearing a shirt
B. None of the above choices .
C. His shirt is made of a material that is hard to burn
D. The room is flammable and will burn


B