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Question
If a trailer begins to jackknife, you should not:
Answers
A.  Release the brakes.
B.  Apply the trailer hand brake.
C.  Allow the wheels to grip the road.
D.  Allow the trailer to straighten out.
Explanation
If a trailer begins to jackknife, you should release the brakes and allow the trailer wheels to regain traction with the road. Do not apply the trailer hand brake to attempt to straighten out the rig because it will only prolong the skid. The application of brakes is what caused the wheels to lock in the first place.

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