Question: The Riverside General Hospital has reported a sudden increase in hospitalizations for acute myocarditis, an inflammation of the heart muscle that can cause chest pain, fatigue, and heart failure. The Riverside Public Health Department has deployed you and your epidemiology team to investigate potential causes. Descriptive data reveal that many affected patients recently purchased beverages from the Downtown FitMart, a local health supplement store. Upon interviewing the store manager, you learn that this store recently began selling a new high-caffeine "energy enhancement" supplement called CardioLiftTM, which claims to boost endurance and metabolism. The supplement has been selling rapidly over the past several weeks. Based on the information discovered so far, which hypothesis should you use for your study? Need Assignment Help?