Question 13 10 pts Based on the sample 2 x 2 table below, which of the following responses defines the risk difference or attributable risk? SAMPLE 2 BY 2 TABLE Outcome Total Factor + + A B A + B D C +D Total A +C B + D A + B +C+D O (A/A+B)/(C/C+D) O (A/A+B) - (C/C+D) O (A/A+C) - (B/B+D) O (A/A+C) - (B/B+D)