In the 1930s, the mean number of years of education in the United States was ______; in the 1990s, the mean was above ______ years.
A. 5; 9
B. 9; 11
C. 9; 14
D. 11; 14
Answer:C
In the 1930s, the mean number of years of education in the United States was ______; in the 1990s, the mean was above ______ years.
A. 5; 9 B. 9; 11 C. 9; 14 D. 11; 14