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.
Mrs. Louis could ask Mr.Hollembeak for <em>further details about his findings and report.</em>
The discussion <em>aims to get the thruth</em> about a possible leak of information by not properly encrypted files. Mr. Hollembeak defends himself stating that concerning his knowledge and responsabilities he is innocent of any negligence for his department's security protocol was up to date.
If Mrs. Louis wants to be an effective participant in the discussion she could ask Mr.Hollembeak further details about his findings and report in order to discover any contradictions in his statement and then feel free to move to another topic.
Most words tend to do that depending on how you use them and where they are located
Because it ended up helping to make the story work just write a long pargraph that doesnt make sence in edgunity and it would give you 100%