The prevalence of multiple sclerosis in extreme northern and southern latitudes suggests that it may be caused by:
A)an autoimmune reaction.
B)a lack of vitamin D.
C)improper blood drainage from the brain.
D)a viral infection.

Question

Quizplus · Accepted Answer

The prevalence of multiple sclerosis in extreme northern and southern latitudes is associated with lower sunlight exposure, leading to a potential deficiency in vitamin D, which is thought to play a role in the disease's development.

The Prevalence of Multiple Sclerosis in Extreme Northern and Southern