GiventhisfragmentfromaJavaEEdeploymentdescriptor：341.<error-page>342.<exception-type>java.lang.Throwable</exception-type>343.<location>/mainError.jsp</location>344.</error-page>345.<error-page>346.<exception-type>java.lang.ClassCastException</exception-ty
题目
GiventhisfragmentfromaJavaEEdeploymentdescriptor：341.<error-page>342.<exception-type>java.lang.Throwable</exception-type>343.<location>/mainError.jsp</location>344.</error-page>345.<error-page>346.<exception-type>java.lang.ClassCastException</exception-type>347.<location>/castError.jsp</location>348.</error-page>IfthewebapplicationassociatedwiththefragmentabovethrowsaClassCastException.Whichstatementistrue？（）
A.Thedeploymentdescriptorisinvalid.
B.ThecontainerinvokesmainError.jsp.
C.ThecontainerinvokescastError.jsp.
D.NeithermainError.jspnorcastError.jspisinvoked.