State whether the following statements are True or False. Give reason in support of your answer:
(a) Suppose A is the exposure and B is a confounding factor for outcome C, then there will be a path from A to C via B.
(b) Doing exercise may also be a regimen.
(c) In clinical trials, a control only may be: treatment or no treatment.
(d) In Greville’s method, the central death rate is more in the life table than the population.
(e) In a slope ratio assay, both regression lines have common slope. 

(a) True. If B is a confounding factor for outcome C, then B is associated with both A and C. Therefore, there will be a path from A to C via B, which can lead ____ _______ __________ ________ ____ _________ ________ __________ __________ ____.
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