An Increase in the Stock of Human Capital Would

An increase in the stock of human capital would

A) shift the production function upward,lowering productivity and raising living standards
B) shift the production function upward,raising productivity and living standards
C) cause the economy to move along a fixed production function,increasing both productivity and living standards
D) cause the economy to move along a fixed production function,reducing both productivity and living standards
E) shift the production function downward,reducing both productivity and living standards