Answer:
Bro, I need to see the passage. And according to what i see here, I think it is D
Explanation:
The second one. The first one uses unnecessary commas
Well, "who's" is who is, it's just a contraction. So, it'd be whose.
"Who is muddy foot prints are those?" doesn't sound correct, but
"Whose muddy foot prints are those?" does.
Hope this helps!