their is a one story that is a sad but it is not a story it is a novel it name is lone ranger on google
The only preposition in the options available to you is of, so the correct answer is C.
A) and B) are conjunctions.
D) is an adverb.
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Polygamy began to end when agricultural development and settling got introduced. During the nomadic non-agricultural period, polygamy was common and people were not tied to a single person.