A case-control study was conducted to assess the association between exposure to chemical solvents and bladder cancer. The researcher assembled a sample of 55 cases and 2820 controls. Among the cases, 45 had been exposed to solvents; among the controls, 1880 had been exposed. Using these hypothetical data, what are the odds of exposure among the controls? Question 15 options: 1 2 4.5 5