Answer: their
Explanation: The sentence is addressing car buyers having something, in this instance a choice. When the subject is possessive, you use their. Such as, the car buyers ate <em>their</em> lunch.
The answer would be C, because him knowing that he can do this to his sister gives him knowledge which then causes him to have power over the situation.
Calendar is spelled wrong. It says Calander is the sentence, while it should be Calendar.
Answer:
Ok give me a few minutes...
Explanation: