I am pretty sure the answer is B.
hope this helps (;
Different materials were available in different locations, so some wigwams might be made of birchbark while others were made of grass, brush, rushes, mats, reeds, animal hides, or even cloth. The finished wigwam made a small home that was 8-10 feet tall.
Social contract theory
"government serves the will of the people"
B because government regulations would increase the cost and make the supply go down as making in mass would be too costly for the company.