What is the speed limit in residential areas?

Answer: A — 25 mph

The speed limit in residential areas is generally 25 mph for the safety of residents living there. While other options such as 30 mph, 35 mph, and 40 mph may seem reasonable, they are not implemented in most residential areas due to safety concerns. These areas are typically designed with narrow roads, frequent intersections, and occasionally pedestrians and cyclists, making it important to drive slowly and cautiously. Speed limits are set in place to prevent accidents and protect the community, and the designated limit for residential areas is typically 25 mph. Therefore, option A is the most accurate and appropriate answer to this question.