A 27-yeаr-оld femаle cоmes tо your office for follow up of her multiple sclerosis. She wаs diagnosed about 2 years ago. She has 3 different episodes lasting each about 3 days (different symptom combinations each time) and about 3 months apart. Those symptoms included weakness, visual loss, bladder incontinence, shooting back pain, clumsiness with walking and/or sensory loss. She has no symptoms today and minimal findings on exam of swelling of the optic disk on fundoscopic exam, inability to walk heel to toe and slight objective weakness of both hip girdles. Given her presentation, which of the following multiple sclerosis subtype does she most likely fit into?