TOEFL Reading: ETS-TOEFL阅读机经 - 6VW3A537C15C1H35L$

What can be inferred from paragraph 6 about masks representing chiefs and their ancestors? A. They were made to be exhibited and appreciated rather than used. B. They include scenes depicting the heroic achievements of chiefs and their ancestors. C. They were made from different materials than were other types of masks. D. They were sometimes worn by non-family members during religious rituals.