請教2個問題－黃金閱讀The origins of theater - 英檢

這篇我錯不少…
有自已檢討過，剩一題怎也搞不懂，(我標題明顯的打錯了，是只有一題…）
所以想請教各位，謝謝～
原文如下：

Paragraph 2:Stories (myths) may then grow up around a ritual.
Frequently the myths include representatives of those supernatural forces
that the rites celebrate or hope to influence. Performers may wear costumes
and masks to represent the mythical characters or supernatural forces in
the rituals or in accompanying celebrations. As a people becomes more
sophisticated, its conceptions of supernatural forces and causalrelationships
may change. As a result, it may abandon or modify some rites. But the myths
that have grown up around the rites may continue as part of the group’s oral
tradition and may even come to be acted out under conditions divorcedfrom
these rites. When this occurs, the first step has been taken toward theater
as an autonomous activity, and thereafter entertainment and aesthetic values
may gradually replace the former mystical and socially efficacious concerns.

題目：

7. According to paragraph 2, what may cause societies to abandon certain rites?
A。Emphasizing theater as entertainment
B。Developing a new understanding of why events occur.
C。Finding a more sophisticated way of representing mythical characters
D。Moving from a primarily oral tradition to a more written tradition

正確答案為Ｂ，想請問為何是B呢?

麻煩版上的各位強者幫我解答了~真的非常感謝~
TOEFL版對自已自修TOEFL的人真的幫助很大啊XDD

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