OG10 阅读 Q28

正确答案为D。提问原文42-49行的功能，原文42行：But why exactly humans might have such fibers， which respond only to a narrow range of rather subtle stimuli, was initially mystifying。 这里表达意思是人类为什么又这样的fibers一开始很神秘，所以这个团队继续研究，对应到D选项。