A group of researchers conducted a fiveyear prospective cohort study among a representative sample of residents, ages 5064, in Houston, TX to assess the incidence of cardiovascular disease (CVD) and stroke in relation to migraine exposure (History of Migraines). The results for the cumulative incidence are tabulated below. CVD per 100,000 Stroker Per 100,000 Chronic Migraines (Exposed) 502 541 No Migraines (Not Exposed) 267 190 For stroke, calculate the cumulative incidence ratio between those with history of chronic migraines and those without it for the 10-year follow-up period. A) 1.25 for the 10-year follow-up period B) 2.51 for the 10-year follow-up period C) 2.85 for the 10-year follow-up period D) 0.82 for the 10-year follow-up period. For CVD, calculate the cumulative incidence ratio and its 95% confidence interval (CI) between those with history of chronic migraines and those without it for the 10-year follow-up period. A) RR=2.77, 95% CI (2.388, 3.212) B) RR=1.25, 95% CI (1.078, 1.450) C) RR=1.88, 95% CI (1.621, 2.180) D) RR=0.66, 95% CI (0.569, 0.765)