What did the speaker do with their car when entering the highway?

The correct response indicates that the speaker accelerated when entering the highway, which is a common and necessary action for safely merging into high-speed traffic. When vehicles enter a highway, they typically need to increase their speed to match that of the traffic on the highway to ensure a smooth and safe integration into the flow of vehicles. This action helps prevent accidents that could occur from entering the highway at a speed significantly lower than that of the other vehicles.

The choices of stopping, turning, or parking do not align with the typical behavior expected when merging onto a highway. Stopping could create dangerous situations, while turning is usually associated with changing lanes or exiting rather than merging onto a straight path. Parking is entirely inappropriate when entering a highway, as vehicles should always be moving to ensure safety on busy roadways.