What is the minimum speed on the freeway?

Answer: D — 65 mph

Freeways typically have a minimum speed limit of 65 mph in most areas. Option A and B are too low and could potentially cause slow drivers to create dangerous situations. Option C may be a common speed limit for highways, but freeways are designed for higher speed travel, so 55 mph would also be too low. Therefore, the minimum speed on the freeway is 65 mph.