Answer:
D.
Step-by-step explanation:
According to the passage, the Inca Yupanqui justified his actions as:
(D) Fulfilling a command from their deities to spread civilization and culture.
The passage mentions that the Incas spread the belief that they were sent from the Sun (chief god) to instruct and reduce mankind from a bestial way of living to rules of morality and political society. This belief was used as a pretext to justify their actions and conquests.