Suppose we know that the risk of liver cancer among alcoholics without cirrhosis of the liver is 25.7%. A researcher conjectures that the risk of cancer among alcoholics with cirrhosis of the liver is higher. Suppose we sample 88 alcoholics with cirrhosis of the liver and determine 32 have liver cancer. Use this information to answer the following:
a. For each person in the sample, what variable is recorded?
A. level of alcoholism
B. if the individual has liver cancer
C. number of years diagnosed with cirrhosis
D. percentage of individuals with liver cancer