The history of using of healthcare data to make projections and support community planning . a. dates back to seventeenth century England b. began with Florence Nightingale c. became prevalent during the American Civil War d. is unique to twentieth-century healthcare practices in the United States

a. dates back to seventeenth century England

Explanation:

Health care data refers to the different records of events obtained in the hospitals. The recording and keeping of these data dates back to seventeenth century England. The events usually include mortality,natality,life expectancy information. Data of mortality caused by different types of diagnosed ailments are usually taken note of. This helps to ensure the proper planning in the health sector. The diseases which requires urgency as a result of its high prevalence are also taken note of for thorough handling and treatments.