Final answer:
The correct action when entering an interstate on-ramp is to increase your speed in the acceleration lane to safely merge with highway traffic.
Step-by-step explanation:
When you enter an interstate on-ramp, stay to the right and increase your speed in the acceleration lane to allow your car to merge with traffic. The correct answer is a.) increase your speed in the acceleration lane. The acceleration lane is designed for vehicles to match the speed of the vehicles on the interstate to facilitate a smooth and safe merge. It's essential to accelerate appropriately so that you can enter the traffic flow without causing other drivers to brake or alter their speed significantly, which could lead to accidents.