单选题
Stoker's argument is based on his belief that______.
A、
language is a product of the brain
B、
language is a system of meaningful codes
C、
sign language is derived from natural language
D、
sign language is as efficient as any other language
【正确答案】
A
【答案解析】
从文章最后一句引用的Stoker的话可知，A项是正确答案。
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