What should you verify about the lights and reflectors on the rearmost trailer of a triples combination?

Pick an answer

1. Rearmost trailer lights are checked only during annual inspections
2. Rear trailer lights are optional as long as the lead trailer's lights are working fine since following traffic is assumed to watch the lead trailer instead
3. That they function correctly and are visible, since this trailer is the primary rear signal for the whole combination
4. Only the tractor's lights need to be checked in a triples combination

Correct!

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