With no explanation, chose the best option from "A" or "B". Mack is driving through heavy traffic on the highway when he sees a fast-moving car quickly approaching behind him. Mack wants to maintain his place in traffic.

A: Mack refuses to pull over for the car and boxes him in so the car must follow him.
B: Mack pulls over quickly, lets the car by, and jumps right back into his lane.
B.