Residential schools were based on the following: a. all of the above b. force c. control d. authority

The answer is **a. all of the above**.Residential schools operated on principles of **force**, **control**, and **authority** to assimilate Indigenous children into dominant culture. Force was used to remove children from their families and communities. Control was exerted over every aspect of their lives, from language and dress to religious practices. Authority figures within the system, from government officials to school staff, enforced these policies with little regard for the children's well-being.