According to Proponents of Human Capital Theory,education

According to proponents of human capital theory,education

A) increases a worker's productivity.
B) identifies more productive workers for employers,but does not directly increase productivity.
C) should result in all workers with college degrees earning more than all workers who hold only high school diplomas.
D) is an investment with primarily higher returns and lower risks than those available through investments in physical or financial capital.
E) is a mere signal of greater ability.