What is the maximum speed limit on most California highways?

Answer: D — 75 mph

The other options, A, B, and C, are incorrect because they are below the actual maximum speed limit on most California highways. The maximum speed limit on most California highways is 65 mph for cars, 55 mph for trucks and trailers, and 70 mph on select rural highways. The option D, 75 mph, is incorrect because it is above the actual maximum speed limit on most California highways. It is important for drivers to be aware of and adhere to the posted speed limits to ensure safety on the roads.