单选题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
单选题
Which element of a web application deployment descriptor element is required（）？
A
B
<auth-method>
C
<security-role>
D
<transport-guarantee>
E
<web-resource-collection>
参考解析
解析：
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