Can we draw the following hypothesis from the context (see options)? 

Context:

Cold Night<br>Tom was out hiking at night. It was summer but the night got cold. Tom didn't realize how cold it got. His sweat started cooling him down too much. Tom got pneumonia because of it.

Hypothesis: Tom was sweating because he was hiking too fast. 
Available choices:
[-] Yes;
[-] It's impossible to say;
[-] No;
It's impossible to say