(单选题)

According to Jennifer DeBruyn, the next step of the study is to ______.

A.identify other means of the breakdown

B.find out the source of the enzyme

C.confirm the research findings

D.increase the breakdown speed

参考答案：B

参考解析：

细节理解题。根据第四段最后一句“The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the worm itself or by its gut microbes (肠道微生物)?”可知，下一步研究是辨清分解的原因，查明这种酶来源于哪里，是虫子自己产生的还是它肠道里的微生物产生的。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语