Compared to the U

Compared to the U.S.production function,the European production function is

A) higher.
B) lower.
C) the same.
D) lower than the U.S.production function at low levels of employment and higher than the U.S.production function at high levels of employment.
E) higher than the U.S.production function at low levels of employment and lower than the U.S.production function at high levels of employment.