Which of these is NOT caused by rough acceleration?

Speed up smoothly and gradually so the vehicle does not jerk. Rough acceleration can cause mechanical damage. When pulling a trailer, rough acceleration can damage the coupling. When starting a bus on a level surface with good traction, there is often no need for the parking brake.
Speed up very gradually when traction is poor, as in rain or snow. If you use too much power, the drive wheels may spin and you could lose control. If the drive wheels begin to spin, take your foot off the accelerator. [Commercial Driver Handbook]