Answer:
you are missing some commas
Explanation:
the sentence should be
The sun was just slipping below the horizon when aunt Nakki , who had ridden her camel from the sultry areas. to the south, arrived at our camp
#2 is correct.
Problems with the others:
#1 - best is a superlative (used to compare more than three or more things)
#3 - best is the greatest something can be so you cannot have more of it
#4 - you either use "more" OR "better" because "more better" would be just be the best
D. He realized he was being punished by God for his disregard for his father's advice.