Which statement about regulatory signs is true?

• A. They indicate warnings of hazards.
• B. They indicate mandatory actions; most are red and white.
• C. They are optional and decorative.
• D. They indicate parking restrictions only.

Answer: (B)

Regulatory signs tell you the actions you must take or must not take; they establish enforceable rules on the road. That’s why this statement is true: these signs indicate mandatory actions you are required to perform, such as stopping, yielding, obeying a speed limit, or not entering. A red and white color scheme is a common feature of many regulatory signs, helping them stand out and signal commands or prohibitions. The other options don’t fit because warnings of hazards are shown by warning signs (usually yellow or orange), regulatory signs are not optional or decorative, and parking restrictions are only one subset of regulatory signs, not the whole category.