Incomplete thought, why was he running to make it to class on time?
A complex sentence contains one independent clause and at least one dependent clause. Here, in your example, there are two simple independent clauses which you need to merge using a dependent adjectival clause in order to make one complex sentence. Here is how to do it:
The boy <u>who wore a green coat</u><u /> carried his sister home.
Answer:
Stubborn and overconfident
Explanation:
he doesnt want help and dies bc hes stupid
The answer is either B or D