Which of the following are three causes that led to decline of the old kingdom

The native people were overworked to the point that they died of sheer exhaustion.

The native people were given poor living and working conditions.

The Spanish destroyed the land and displaced the Indians from their land.

The native people did not have immunity from European diseases, such as smallpox, measles, typhus, chicken pox, and mumps.

The Spanish government ignored the native people’s plight. The government was not concerned about

humane treatment of the native peoples; it was only interested in the riches that resulted from their labor.

As the native population declined, the Spanish government realized that they needed more workers. The

Spanish government decided to get African people to do the work.