单选题 According to the passage, which of the following was the most important reason for the Aleuts' devotion to their language?

A、 Invention of a written version of their language.
B、 Disruption of oral transmission of tribal knowledge.
C、 Introduction of old Slavonic for worship.
D、 Institution of compulsory English education.

【正确答案】 B

【答案解析】由第一段最后两句话“The slaughter of the majority of an adult generation was sufficient to destroy the continuity of tribal knowledge，which was dependent upon oral transmission．As a consequence，the Aleuts developed a fanatical devotion to their language as their only cultural heritage．”可以得到答案B。