In 2004, based on concepts similar to those used to estimate U.S. employment figures, the Canadian adult noninstitutionalized population was 25.022 million, the labor force was 15.864 million, and the number of people employed was 14.849 million. According to these numbers, the Canadian labor-force participation rate and unemployment rate were about

a. 67.8% and 6.4%
b. 67.8% and 4.4%
c. 63.4% and 6.4%
d. 63.4% and 4.4%