15. Which of the following questions is NOT answered by the passage?
(A) Who pours the water in a sweat lodge ceremony?
(B) What do people do in a sweat lodge ceremony?
(C) What do people wear in a sweat lodge ceremony?
(D) Who brought sweet grass or sage for a sweat lodge ceremony?

A traditional Native American sweat lodge is dome-shaped and built low to the ground. Rocks are heated up in a fire outside the lodge and then brought into the center of the lodge with a shovel and placed in a dug pit. More rocks are brought in, traditionally in four rounds, and the sweat lodge gets progressively hotter. The person in charge of the ceremony “pours the water” and is responsible for the health and well-being of participants. Typically, there are 8 to 12 participants, but there can be as many as a few dozen. Pouring water on the rocks creates steam, which makes the Native American sweat lodge feel even hotter. Sweet grass or sage is scattered on the rocks. You might be smudged with sage smoke before entering the sweat lodge to aid with the ritual of purification. It is usual to offer up prayers, share your thoughts with others, and ask for the release of pain and suffering.