What signal flagger device is required for controlling traffic in a single-lane TTC zone on a public highway per the California MUTCD?

1. A standard 12-inch red cloth rag attached to a wooden stick.
2. A handheld green plastic flashlight with no reflector markings.
3. An octagonal STOP/SLOW paddle at least 18 inches wide with 6-inch letters.
4. A high-powered laser pointer aimed at oncoming vehicle windshields at night.