Which of the Following People Is at Highest Risk for Multiple

Multiple Choice

Which of the following people is at highest risk for multiple sclerosis?​ 

A) an elderly man with a family history of multiple sclerosis living in Panama 
B) a young man living in California who spends a lot of time in the sun as a construction workera young man living in California who spends a lot of time in the sun as a construction worker 
C) an older woman with a family history of multiple sclerosis who lives in Mexico 
D) a young woman with a history of mononucleosis living in New York