Solids has a definite shape and sizes or matter
Your answer is gentle souls are often disguised by rough exteriors. The others do not cover the overall theme of the book. Yes some rich and poor kids do not get along, but that is not an overall lesson. Also how often did they walk home alone. The story does not revolve around that. Last, Cherry was not a main character, she was not a main part of the plot. So your answer is once again the first one, it goes with the overall plot of the story.
Answer:
“Dave refused to run quietly on the trail behind the sled, where the going was easy, but continued to flounder alongside in the soft snow, where the going was most difficult, till exhausted.”
A, B, and D begin statements that can stand by themselves logically. C begins a statement that shows how the previous statement and itself are connected. As such, the answer is C(As a result).