It would be d. conjunctions because they help your sentence flow easily.
Answer: C) Tutankhamun gained physical abilities through swimming, weapons training, and driving a chariot to make him a strong leader.
The claim of this particular statement is that he 'gained physical abilities'. Then, there were examples given to support this statement (swimming, weapons training, etc) which were all types of physical activities.
Word meaning: violating a law or personal code of conduct.
Prefix: Contra
Prefix meaning: Opposite
Hope this helps! :D