What is the speed limit on local roads when there are no speed-limit signs posted?

Answer: C — 35 mph

When there are no speed-limit signs posted, the speed limit on local roads is typically 25 mph. This is because local roads are often in residential areas with a lot of pedestrian traffic, so a lower speed limit helps to ensure the safety of those walking and biking in the neighborhood. Option A (55 mph) is incorrect because that speed is typically reserved for freeways or highways where there are fewer potential hazards. Option D (45 mph) may be an appropriate speed limit for rural or rural-like roads, but it is still higher than the typical speed limit for local roads. Option B (25 mph) could potentially be correct, but it is too general of an answer and does not address the specific scenario given in the question. Option C (35 mph) is incorrect because it is also too high of a speed limit for local roads.