Which of the following is true ? A. Unemployment rate measures the percentage of unemployed people in the population B. If a person does not have a job and is not actively looking for a job, he is classified as "unemployed" by Bureau of Labor Statistics. C. Labor force includes all US residents who are 16 years old and above, who either have a job or who do not have a job but is actively looking for one. D. All of the above.