Stiff muscles are categorized by painful contractions. Therefore, the answer is option A
Explanation:
Stiff muscle is a situation in which the muscle becomes hard and it is very difficult to move. In some cases people feel cramp, muscle pain etc. Some of the factor which cause muscle stiffness is strain stress injuries etc.
When a person is suffering from muscle stiffness, he can overcome through having some exercises. Some people also prefer to use oil and do massage on a particular area to get rid of muscle stiffness.
