Question 12 One of the reasons that cohort studies provide a stronger evidence than cross-sectional studies is: C X X C A. That risk can be calculated directly, Both B. They start with diseased and non-diseased groupses (Cross seltengl C. They examine prevalence data incidence (cohort) D. They are retrospective. Question 13 Of the following, which reflects the strength of the association between a disease and exposure? A. Degree of statistical significance