1. A researcher is planning to conduct a study to measure the impact of smoking during pregnancy and the baby’s health outcomes. Discuss each of the following scenarios. The expected length of the answer of each scenario is approximately 3 lines. Feel free to provide as much details as you need.
    1) If the researcher has used a case control study design, would it be suitable for measuring the impact? Explain why.
    2) If the researcher has used a cohort study design, would it be suitable for measuring the impact? Explain why.
    3) If the researcher has used a cross-sectional study design, would it be suitable for measuring the impact? Explain why.
    4) If the researcher has used a randomised controlled trial study design, would it be suitable for measuring the impact? Explain why.
    5) Which of the above four study designs you think is most suitable for answering the research question and why.

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