Final answer:
The muscles of MS clients will be spastic, which is a result of damage within the central nervous system that presents with increased muscle tone and reflex activity.
Step-by-step explanation:
Will the muscles of Multiple Sclerosis (MS) clients be spastic or flaccid? The correct answer is spastic (a). MS is a disease that affects the central nervous system, which results in damage to myelin sheaths and ultimately affects the transmission of nerve impulses. This damage often leads to spasticity, a symptom characterized by a phasic change in muscle tone, where muscles may abruptly contract when passively stretched and have increased reflex activity, described as hypertonia. This is contrary to hypotonia, where muscles are flaccid and display weak reflexes due to damage or loss of innervations, as seen in diseases like poliomyelitis.