When driving in the left lane, what is the maximum speed limit?

Answer: D — 65 mph

When driving in the left lane, it is important to follow the designated speed limit for that particular road and location. Speed limits vary based on the type of road, weather conditions, and other factors. A, B, and C are incorrect because they suggest a specific maximum speed limit that may not apply in all situations. While general guidelines for speed limits exist, it is important to pay attention to posted speed limit signs and adjust your speed accordingly. Ultimately, it is the responsibility of the driver to ensure they are following the designated speed limit for their safety and the safety of others on the road.