Dr. Kistler is interested in learning about the long-term effects of ipad use in early childhood. She selects 100 5-year-old children and monitors them over the next 15 years. Dr. Kistler is conducting which type of study

What is one example of economic policy? a. a state government increasing tax rates b. a neighborhood group collecting money to build a playground c. a city building a new school d. a company giving high-performing employees a raise