When entering a freeway from an on-ramp, you should:

Answer: C — Check for vehicles and adjust speed before merging

When entering a freeway from an on-ramp, it is essential to check for vehicles already on the freeway and adjust your speed to facilitate a safe merge. This approach is crucial because the traffic on the freeway is moving at higher speeds, and your ability to blend into this flow depends on both awareness of existing traffic and appropriate speed adjustment. By checking your mirrors and blind spots, you can identify gaps in traffic and safely accelerate to match the speed of vehicles already on the freeway. This ensures a smoother merging process and reduces the likelihood of accidents that can occur if you attempt to merge without considering the prevailing conditions. Stopping on the on-ramp or coming to a complete stop can create dangerous situations both for you and for other drivers, as it may lead to abrupt changes in traffic flow. Therefore, assessing traffic and adjusting accordingly is the safest way to enter a freeway.