The Human Resources Department of a large corporation maintains records on its employees. Data are maintained on the following variables: age, employment category, highest level of education completed, whether the employee participates in a wellness program, and number of paycheck benefit deductions. Which of these variables are categorical?

Employment category, highest level of education completed, and whether the employee participates in a wellness program

Highest level of education completed, whether the employee participates in a wellness program, and number of paycheck benefit deductions

Age, employment category, and highest level of education completed

All of the variables

None of the variables