Problem: A researcher wants to determine whether prenatal exposure to phthalates increases the risk for developmental delay. Prenatal exposure to phthalates was categorized as low and high based on data collected during prenatal appointments. Infants were followed up from birth to 2 years at which time investigators administered various tests to determine developmental delays. a) What is this study design? b) Given the type of study design, what may be a likely source of bias? c) Given the type of study design, what may be a likely source of confounding? Need Assignment Help?