If we are studying the possible relationship of benzene exposure and lung cancer and the response rate of potential subjects is higher in people with lung cancer who were exposed to benzene than in people with the lung cancer who were not exposed, an apparent association could be observed even if in reality there is no association. The following is an example of what type of error in epidemiology? A. Confounding
B. Interaction
C. Selection Bias
D. Recall Bias