According to Marx, how does capitalism generate value from labor?

A. The goods workers make or the services they provide can be sold for more than they earn, generating surplus value
B. When reinvestment and imperialism are combined, communities can be forced to buy commodities they did not want, generating use value
C. Commodities can become prestigious, generating fetish value
D. When workers are paid adequately, they can exchange their wages for commodities, generating exchange value
E. The bourgeoisie can control the actions of the proletariat, generating sign value