How did chattel slavery and the encomienda system develop and impact the Americas?

A. Each system developed as a way of ensuring labor for colonizers. Each system was based on race, which has had long-term effects on the structure of the societies of the Americas.
B. Each system developed as a way of ensuring labor for colonizers. Each system was based on national origin, which has had long-term effects on the structure of the societies of the Americas.
C. Each system developed as a way of ensuring labor for the Indigenous peoples of the Americas. Each system was based on race, which has had long-term effects on the structure of the societies of the Americas
D. Each system developed as a way of ensuring a steady supply of food for the Americans. Each system was based on race, which has had long-term effects on the structure of the societies of the Americas.

A. Each system developed as a way of ensuring labor for colonizers. Each system was based on race, which has had long-term effects on the structure of the societies of the Americas.