This is a hard one and I can see why you decided to post it here. B is most definitely wrong but the other three are all neck and neck. There are both even pros and cons of A and C but I think it would be more reasonable to adopt a general routine. So I think the answer would be C.
12kilometers=6hours
32kilometer=x
12/6=2
32/2=16
It will take him 16 more hours to cover the rest of the distance
Answer:
Making this difficult choice requires a great deal of careful thought.
Explanation:
Typically in english you place the adjective before the noun.
