Final answer:
The safest way to enter the flow of traffic on a highway with a very short entrance lane is to wait for a large gap in traffic and then speed up quickly.
Step-by-step explanation:
The safest way to enter the flow of traffic on a highway with a very short entrance lane is to wait for a large gap in traffic and then speed up quickly (c).
By waiting for a large gap in traffic, you give yourself enough time and space to safely merge into the flow of traffic. Once you have identified a gap, you should accelerate quickly to match the speed of the traffic on the highway, ensuring a smooth merge.
Using the left lane of the highway to get up to cruising speed (a), driving slowly and being prepared to stop for freeway traffic (b), and entering the freeway at a sharp angle (d) are not safe approaches and can lead to accidents or disrupt the flow of traffic.