A 23-Year-Old Female Complains of Episodes of Blurry Vision and Numbness

A 23-year-old female complains of episodes of blurry vision and numbness and tingling in the left foot.When the foot "falls asleep," the patient feels "imbalanced" and a gait disturbance develops,making the patient fall.The patient has a medical-surgical history of appendectomy age 10.Otherwise,patient has no history of illness and takes no medications.Denies use of tobacco or alcohol.On physical examination,vital signs are T 98 degrees,18 resps/min,pulse 66,and BP 110/60.Vision: 20/20 os,20/20 od,and 20/20 ou.Heart: regular rate and rhythm,no murmurs.Lungs are clear to auscultation.Abdomen is non-tender with no organomegaly.Extremities: Skin is pink,cool to touch,and intact bilaterally.Left and right quadriceps muscle strength 5/5.DTRs left and right + 2/4.No clonus.Negative Homan's and Babinski's sign.Sensation to pinprick and cotton ball intact in extremities and equal bilaterally.Dorsalis pedis pulses +1 /4 bilaterally.No neurological deficits.The following disorder(s) should be considered in the diagnosis:

A) Multiple sclerosis
B) Peripheral vascular disease
C) Restless leg syndrome
D) None of the above