In which of the following cases is it not recommended to turn on a differential lock in an agricultural tractor?

The differential lock forces the wheels on a single axle to rotate at the same speed, which is useful on soft or slippery terrain. However, when driving on a winding road, the wheel on the outside of the turn must rotate faster than the inner wheel. Engaging the lock in such a situation would lead to stresses in the drivetrain and could cause a loss of traction and control of the vehicle.