Answer: c) both a and b
Explanation:
Alcohol is the chemical substance that is toxic and harmful for the health.It is usually consumed in liquid form and makes body addictive to it. It causes severe health issues like cancer, dizziness, manipulation in brain, etc.
Motor performance is the doing the motor tasks like some specific physical activities. Alcohol manipulates motor performance by altering the balance and coordination present in mind for performing the activities
Thus, all the options are correct.