Colfax Beta-80 is a rare genetic defect found primarily

Colfax Beta-80 is a rare genetic defect found primarily in people of Scandinavian descent. Over 97% of known carriers of this defect have are citizens of, or are direct descendants of immigrants from, Denmark, Norway, and Sweden. People who carry the Colfax Beta-80 defect are at substantially higher risk for contracting Lupus and related autoimmune diseases.

Assuming the statements above are true, which of the following can be inferred from them?
(A) People from Denmark are at a higher risk for Lupus than people of other, non-Scandinavian countries.
(B) Genetic engineering that eradicated this genetic defect would constitute a de facto cure for Lupus.
(C) Find a cure for Lupus would eliminate most of the health threats associated with the Colfax Beta-80 defect.
(D) A person not of Scandinavian descent born with the Colfax Beta-80 defect is more likely to contract Lupus than is a Scandinavian who is born without this defect.
(E) The majority of people who contract Lupus are either Scandinavian or of Scandinavian descent.

Some CR questions deal with the tricky issues of populations & proportions & percents. For a discussion of this genre, with common fallacies, as well as a full explanation of this question, see:
http://magoosh.com/gmat/2013/gmat-criti ... pulations/

Mike