Final answer:
D. both A and C. Backing under your trailer at an angle can push the trailer sideways and damage/break the landing gear.
Step-by-step explanation:
Backing under your trailer at an angle can:
- Push the trailer sideways: When backing under the trailer at an angle, the force exerted on the trailer can cause it to move sideways. This can result in the trailer being misaligned or jackknifed.
- Damage/break the landing gear: If the angle is too steep or if the trailer is not properly aligned, it can put excessive pressure on the landing gear, potentially causing damage or breakage.
Therefore, the correct answer is D. both A and C.