Passage: "During a traffic stop, CHP officers should approach the vehicle from the rear, position themselves behind the B-pillar when possible, and request the driver's license, registration, and proof of insurance before initiating any further contact." According to the passage, where should an officer stand during a stop?

1. In front of the vehicle
2. Behind the B-pillar when possible
3. Inside the suspect vehicle
4. Beside the driver's window directly