I believe the answer is “His” hope this helps lol <3
C. has, singular. The verb form is describing a boy which is singular
The answer is main clause
For he thinks that this kind of friendship can exist only when one spends a great deal of time with the other person, participating in joint activities and engaging in mutually beneficial behavior; and one cannot cooperate on these close terms with every member of the political community.
I believe it is simple and merry christmas to you too