Which of the following is NOT one of the two basic types of signs?

• A. Permanent
• B. Temporary
• C. Indoor and outdoor
• D. Regulatory and advertisement

Answer: (C)

The main idea is that signs are commonly categorized by how long they’re intended to stay in place: permanent signs and temporary signs. This duration-based distinction is the fundamental way we classify signs for planning and enforcement.

Indoor and outdoor describes where a sign is placed, not how long it lasts, so it’s not considered a basic type of sign. A sign can be permanent or temporary whether it’s indoors or outdoors. That’s why this option is the one that isn’t a basic type.

For context, permanent and temporary are the two foundational categories; regulatory and advertisement refer to the sign’s purpose or use, which is a different way of classifying signs, not the duration.