In Terms of the Evolution of Payment and Exchange,wage Labor

In terms of the evolution of payment and exchange,wage labor is more developed than piecework payment because under wage labor:

A) the employer assumes responsibility for the quality of the raw materials,the technology,and the production process.
B) workers are paid not for a direct service but for the sum total of their services.
C) workers control the pace and conditions of their labor.
D) more personal relationships between worker and employer are created.