A fortune 500 company concerned about the retirement investments made by its employees collected the following data: age of employee, amount contributed monthly, and type of contribution (401(k), Roth IRA, etc.). Select the choice below that correctly names all the relevant variables and only the relevant variables, correctly identifies them as qualitative or quantitative, and correctly indicates the unit of measure for quantitative variables. A. Age of employee, quantitative, years; amount contributed monthly, quantitative, dollars; type of contribution, qualitative. B. Age of employee, quantitative, years; amount contributed monthly, quantitative, dollars; type of contribution, qualitative; fortune 500 companies, qualitative. C. Age of employee, quantitative, years; amount contributed monthly, quantitative, dollars; type of contribution, quantitative, dollars. D. Age of employee, quantitative, years; amount contributed monthly, categorical; type of contribution, categorical E. Age of employee, quantitative, years; amount contributed monthly, quantitative, dollars.