Cohort studies preserve the temporality of cause (exposure) happening before the effect (disease)

a. True

b. False

The answer would be true

Cohort and experimental study are best for finding causality because in both studies the effect/disease is not exist before the cause/exposure given. The sample of this study will be classified based on exposure of a certain factor. Cohort study is preferable in many case because intentional exposure in experimental study is not ethical.