The practice of encomienda meant that

A) Indians were forced to attend Christian services.
B) Indians were forced to go to Spain to work.
C) Indians and the Spanish could not intermarry.
D) Indians were forced to work for the Spanish.
E) the Spanish were forced to pay native workers a fair wage.

The practice of encomienda was a system in which Spanish colonizers were granted the use of indigenous people as laborers in exchange for protection and Christianization. This often resulted in forced labor and exploitation of the indigenous population. Therefore, the correct answer is D, which states that Indians were forced to work for the Spanish.