According to the passage, the report issued by the IOM and the explanation offered by the Danish researchers differed on the issue of whether A. the consumption of omega-3 fatty acids was responsible for observed reductions in the risk of heart disease B. the consumption of seafood has an effect on a person's likelihood of developing heart disease C. seafood is a significant enough source of omega-3 fatty acids for its consumption to affect human health D. factors other than diet are primarily responsible for determining a person's likelihood of developing heart disease E. the frequency of heart disease among Greenland's indigenous populations could be related to diet