【单项选择题】
A developer has used this code within a servlet：<br /> 62.if（request.isUserInRole（"vip"）） {<br /> 63.// VIP-related logic here<br /> 64.}<br /> What else must the developer do to ensure that the intended security goal is achieved？（）<p> A developer has used this code within a servlet：<br /> 62.if（request.isUserInRole（"vip"）） {<br /> 63.// VIP-related logic here<br /> 64.}<br /> What else must the developer do to ensure that the intended security goal is achieved？（）</p>
A、A.Create a user called vip in the security realm
B、B.Define a group within the security realm and call it vip
C、C.Define a security-role named vip in the deployment descriptor
D、D.Declare a security-role-ref for vip in the deployment descripto
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