对于一个要死的人,救救我吧

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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
A和B有什么区别啊！