The BLS recently reported that there were 48.6 million people over age 25 who had at least a bachelor's degree. Of this number, 38.0 million were in the labor force and 36.9 million were employed. What was the labor-force participation rate and the unemployment rate for this group?
选项：

A:about 97 percent and about 2.9 percent;
B:about 97 percent and about 2.3 percent;
C:about 78 percent and about 2.9 percent;
D: about 78 percent and about 2.3 percent