The root of the problem mentioned in the first paragraph is __________.

A．It is impossible to merely rely on our own effort to create a decent and humane society.
B．Problems of industrial life arise directly or indirectly from the frustrations caused by in equality at work.
C．We have little hope of creating a decent and humane society.
D．Only after we solve the problem of inequality at work first can we create a decent and humane society.

A．have the power to control others' working lives to a considerable degree
B．have opportunities of personal development
C．think that their workers are mere cogs in the bureaucratic machine
D．think it very important to have the opportunity to initiate in their work