The correct answer based on the given question above would be the third option. The model that suggests that our "self" has four aspects that control what we share with others is the "Johari Window Model". This model is a technique that aims to let people understand their relationship with themselves and with others. It was created by Joseph Luft and Harrington Ingham.
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.
He wants every man and women to be treated as equals.
