单项选择题Which element of a web application deployment descriptor  element is required?()

A.<realm-name>
B.<auth-method>
C.<security-role>
D.<transport-guarantee>
E.<web-resource-collection>


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3.单项选择题

Click the Exhibit button.

The attribute "name" has a value of "Foo,"
What is the result if this tag handler’s tag is invoked?()

A.Foo
B.done
C.Foodone
D.An exception is thrown at runtime
E.No output is produced from this code

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