The electric connections to your towing vehicle are interrupted. What device on the trailer is therefore rendered inoperable?

You are correct in selecting answer 1 (The anti-lock braking system (ABS)) and answer 2 (The electronic braking system (EBS)).

Both ABS and EBS on a trailer depend on an electrical connection to the towing vehicle to function properly. If these connections are interrupted, these systems can no longer receive the signals or power they need and will not work, which can compromise safety during braking.

The traction control system (TCS), mentioned in answer 3, is typically not found on the trailer but rather operates on the towing vehicle itself, so it is not affected by a loss of electric connection between the towing vehicle and trailer.

In summary: If the electrical link is cut, both the ABS and EBS of the trailer will become inoperable. This highlights the importance of always checking these connections before driving with a trailer.