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