How can you tell if a converter dolly has anti-lock brakes?

Question

A converter dolly equipped with an Anti-Lock Braking System (ABS) is required to have a yellow lamp on its left side.

Accepted Answer

There will be a yellow lamp on the left side of the dolly.

Answer

There will be a sticker displaying the letters "ABS."

Answer

There will be a plaque containing information on the side of the dolly.

Answer

There will be a blue light on the side of the dolly.