The king of Spain governed his colonies through viceroys.
Which explanation best describes the viceroyalty system and the royal servants who ran it?
A: Viceroys watched over the rights of the king's Indian subjects.
B: Viceroys made sure that Spanish colonists had no grievances against the king.
C: Viceroys made sure that products from the Americas were cheaper than those in Spain.
D: Viceroys watched over the king's lands, increased his wealth, and carried out his will.