The Legal Profession Conducted a Study to Determine the Percentage

The legal profession conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the last ten years. The sample was randomly chosen from a national directory of doctors. Identify the individuals in the study.

A) the responses: have been sued/have not been sued for malpractice in the last ten years
B) all cardiologists in the directory
C) the doctor's area of expertise (i.e., cardiology, pediatrics, etc.)
D) each cardiologist selected from the directory