When merging into traffic on the highway, you should:

Answer: B — Signal and move into the lane with caution

When merging into traffic on the highway, it is important to signal and move into the lane with caution because it ensures that other drivers are aware of your intentions and can adjust their speed or position accordingly. Option A is incorrect because slowing down too much can disrupt the flow of traffic and cause an accident. Option C is incorrect because making an illegal lane change is dangerous and can result in a traffic violation. Option D is also incorrect because speeding up to avoid other cars can be reckless and dangerous.