请教一个简单结构问题~

哎唷不小心

Despite the growing number of people who purchase plane tickets online, airline executives are convinced that, just as one-third of bank customers still prefer human tellers to automatic teller machines, many travelers will still use travel agents.

A.     growing number of people who purchase plane tickets online, airline executives are convinced that, just as one-third of bank customers still prefer human tellers to automatic teller machines, many travelers will

B.     growing number of people who purchase plane tickets online, airline executives are convinced, just as one-third of bank customers still prefer human tellers to automatic teller machines, that many travelers would

C.     growing number of people purchasing plane tickets online, airline executives are convinced, just as one-third of bank customers still prefer human tellers as compared to automatic teller machines, many travelers will

D.     fact that the number of people purchasing plane tickets online is growing, airline executives are convinced, just as one-third of bank customers still prefer human tellers as compared to automatic teller machines, that many travelers would          (A)

E.     fact that the number of people who purchase plane tickets online are growing, airline executives are convinced that, just as one-third of bank customers still prefer human tellers compared with automatic teller machines, many travelers would

题目我是没有疑问，这里我想问一下just as one-third of bank customers still prefer human tellers to automatic teller machines这句话是不是插入语，因为前后都有逗号夹着？
如果是插入语的话在和后面并列不是不符合逻辑？
求各位NN解答，灰常感谢~~~~

Kya

个人理解不作插入语，因为that后面 just as one-third of bank customers still prefer human tellers to automatic teller machines, many travelers will still use travel agents.
翻译出来：正如1/3的银行客户更喜欢human tellers多于ATM这种情况一样 , 许多旅行者更喜欢使用旅行社来定机票
这句话的语义非常完整，just as前面有逗号只不过使得这句话的语义更加独立和清晰
供参考

哎唷不小心

Kya 发表于 2013-10-2 20:58
个人理解不作插入语，因为that后面 just as one-third of bank customers still prefer human tellers to a ...

嗯，谢谢，我搞不清的地方主要就是前面那个逗号，听你这么一讲，感觉很有道理，谢谢~