A good way to interact with passengers is to keep the discussion to things.

D. simple
Explanation:
A good way to interact with passengers is to keep the discussion to simple things.
Of you have an overly talkative conversation, or a conversation that involves heavy thinking, you can lose focus on the road. This happens to my mom all the time, I will start talkong to her about something heavy, and she will forget where she was going because they are focusing on the conversation, not the road.