Final answer:
When driving a slow-moving vehicle with vehicles behind you on a 2-lane highway, you should pull off at the first safe turnout to allow them to pass.
Step-by-step explanation:
If you're driving a slow-moving vehicle on a 2-lane highway and you have multiple vehicles behind you, the most appropriate action to take would be to pull off at the first safe turnout. By doing so, you allow the faster-moving vehicles to pass, alleviating any potential traffic build-up and maintaining safety for all users of the road. Although it might not be explicitly stated as one of the possible answers provided to the student, this is the advised course of action based on most driving guidelines.