A dc shunt motor is running at 1000 rpm at the rated load torque. If we reverse the filed winding terminals, then the __________

• A. direction of rotation reverses and commutation will be unaffected
• B. direction of rotation will be same and commutation will be unaffected
• C. direction of ration reverses and commutation will be affected
• D. direction of ration will be same and commutation will be affected