A nurse is assessing a client who has multiple sclerosis. Which of the following manifestations should the nurse expect?

The correct answer is A: Nystagmus. In multiple sclerosis, damage to the nerves can affect eye movement control, leading to involuntary eye movements like nystagmus. This is a common manifestation due to the demyelination of the optic nerve. Hypoactive deep tendon reflexes (B) are not typically associated with multiple sclerosis, as it often presents with hyperactive reflexes. Persistent nausea (C) is not a common symptom of multiple sclerosis unless it is related to other comorbid conditions. Fever (D) is not a typical manifestation of multiple sclerosis and would indicate an infection or other underlying issue.