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单项选择题 Given this fragment from a Java EE deployment descriptor： 341. 342.java.lang.Throwable  343./mainError.jsp 344. 345. 346.java.lang.ClassCastException  347./castError.jsp 348. If the web application associated with the fragment above throws a ClassCastException.Which statement is true？（）

A、The deployment descriptor is invalid.

B、The container invokes mainError.jsp.

C、The container invokes castError.jsp.

D、Neither mainError.jsp nor castError.jsp is invoked.

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