THE DATA TABLE:

Employee Name Years of High Education Current Salary
Joslyn Smith 6 $81,500
Heather Miller 2 $38,000
Marie Coolidge

Examine the data table, which shows a list of employees at a company, how many years of higher education they have, and their current salary. Use this table to answer the question. Which of the following is a variable in the data table above?
a previous salary
b years of experience
c years of higher education
d average salary

c years of higher education is the variable in the data table above.