Which statement about coupling and uncoupling is correct?

1. A safe coupling sequence includes inspection, alignment, backing under, tug test, visual check, line connection, brake test, and landing gear stowage.
2. This statement confuses the tested combination-vehicle rule with an unrelated CDL topic.
3. This answer would create an unsafe coupling, braking, turning, or inspection habit.
4. This choice is not supported by the Texas CDL handbook or FMCSA combination-vehicle standards.