It would be A.
The incorrect contraction in that sentence is it's. It's is a contraction for it is, so it basically means : They're following the creek to it is source. This doesn't make sense. So, you would replace it with the other form, which is its. Its shows possession.
Hope this helps!
Answer:
Answer is B and maybe add more to the text to i can give more explanation?
Answer:
by having the characters speak
Explanation:
well thats a person quality so its gotta be that