What does the speaker mean by calling marriage a "monopoly, and not of the least invidious sort"? (paragraph 7) A. Marriage increases the wealth of those who get married.
B. Married people manipulate situations to benefit themselves.
C. In a marriage, only one person has complete control.
D. Economic markets influence marriages.
E. Marriage is exclusive control of another person.

C. In a marriage, only one person has complete control.

Explanation:

In the paragraph seven of the "A Bachelor's Complaint of the Behaviour of Married People", Charles call marriage a "monopoly, and not of the least invidious sort" because in a marriage, only one person has complete control according to him.

He says that the person with the upper hand in a marriage always try to keep his/her privilege exclusively adamant towards his/her partner. It is not a matter of one-sided/invidious sort of control but rather a natural way of how marriages work. The one with the exclusive privilege control the other person.

dude, * is in your own words, not mine.

* = the answer