[求助]Prep 99

99. Scientists have found new evidence of people initially registering emotions like sadness or anger in much the same way as heartburn—by monitoring what’s going on within their bodies.

A. of people initially registering emotions like sadness or anger in much the same way as

B. of people initially registering emotions such as sadness or anger much the same way as experiencing

C. that people initially register emotions such as sadness or anger in much the same way as they experiencing

D. that a person initially registers emotions such as sadness or anger much the same way as experiencing

E. that a person initially registers emotions like sadness or anger much the same way as

C是答案。但看不懂as they experiencing是什么结构啊 ？

This typo leads me to the wrong answer B.

Be careful, CDers, if you're confused at the answers of a question, better to check the original prep crack.