Incan priests were often aided by what to heal people?

an assistant who lit the incense

surgeons who could perform successful bone transplants

healing ceremonies

chieftains who calmed anxious patients

surgeons who could perform successful bone transplants

Explanation:

The "Inca Empire" is a civilization which flourished in Peru long time ago. They were popular for having a tight security in their empire and for having advanced techniques in treating patients with diseases.

"Inca priests" normally takes over the healing ceremonies in order to heal or treat people. The ceremony is a combination of both natural and supernatural practices. During the ceremony, they are aided by Inca surgeons and Inca hunters.

Inca surgeons performed operations such as amputations, wound care, surgical sutures and even bone transplantation. They can even do "cranial surgery." This proved the civilization to excel over the others.

Thus, this explains the answer.