Answer:
His expectations
Step-by-step explanation:
Here, David expects that people who drive SUVs are dangerous drivers. Something in his past may have caused him to think like this. When David observes any SUV which is being driven then he immediately thinks that the car is being driven rashly.
He has already made up his mind of the nature of people who drive SUVs. This makes him believe that even though an SUV which is being driven normally he believes that the SUV is being driven rashly.