Why Were the New Spain Retablos (Altarpiece Ensembles)designed to Be

Why were the New Spain retablos (altarpiece ensembles) designed to be so extravagant?

A) To contrast with the simplicity of the indigenous people's sacred spaces
B) To impress the indigenous people into converting to Christianity
C) To show the indigenous people how their taxes were spent
D) To Christianize the indigenous people's existing art