Answer: it is c
Explanation: because if you go back in the story it will tell you that John Thornton unloaded half of Hal’s things to make the sled less heavy
That they are at a high level of education and to respect them
Ashley couldn’t hear her mother
1 and 2 require commas. It then becomes an apposition that explains the subject "everyone" better. Three should be a dot with a capital letter on Y while 4 should be a comma as well to separate clauses.