Consider the following two cases: Case 1: We developed a study to determine if smoking caused lung cancer. 100 women were taken in which 50 of them smoked for 10 years and the other 50 had been smoke free. It was discovered that there was a relationship between smoking and lung cancer. Case 2: We developed a study to determine if smoking caused lung cancer. 100 women were sampled where the researcher made 50 of them smoke for 10 years and the other 50 women were asked to be smoke free. It was discovered that there was a relationship between smoking and lung cancer. Choose the correct answer. O They are both observational studies O There is not enough information O Case 1 is an experiment and Case 2 is an observational study O Case 1 is an observational study and Case 2 is an experiment O They are both experiments

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A: Other expert has solved part b. Here We include part a answer.

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