Which best describes the role of viceroys in Spain's American empire?

A.
Viceroys watched over the king's lands, increased his wealth, and carried out his will.

B.
Viceroys made sure that products from the Americas were cheaper than those in Spain.

C.
Viceroys made sure that Spanish colonists had no grievances against the king.

D.
Viceroys watched over the rights of the king's Indian subjects.