[单选]

You create a Web site that is for members only. The Web site allows members to create lists of users that have access to information about member profiles. The name of the list is stored in the listName variable. The user name of the user to whom access is given is stored in the username variable.You need to enable members to manage their lists of users.
Which code segment should you use?（）

You use Microsoft .NET Framework 4 to create an application.   The application contains a partially trusted client assembly and a server assembly.  You create a custom sandboxed application domain.   You need to ensure that the application can be executed in a partial-trust environment.  What should you do?（） Apply the following attribute to the server assembly. [assembly: AllowPartiallyTrustedCallers(PartialTrustVisibilityLevel=VisibleToAllHosts)]。 Apply the following attribute to the server assembly. [assembly: AllowPartiallyTrustedCallers(PartialTrustVisibilityLevel=NotVisibleByDefault)]。 Apply the following attribute to the client assembly. [assembly: AllowPartiallyTrustedCallers(PartialTrustVisibilityLevel=VisibleToAllHosts)]。 Apply the following attribute to the client assembly. [assembly: AllowPartiallyTrustedCallers(PartialTrustVisibilityLevel=NotVisibleByDefault)]。 糖皮质激素诱发与加重细菌性感染的主要原因是（） 激素剂量不足。 激素抗菌力下降。 激素降低机体防御机能。 激素激活菌体繁殖力。 在参照和被参照的关系中，每个外码值或者为（），或者等于某个（）。 最基本的心里过程是（）。 动机。 认知。 行为。 情绪。 压力的国际计量单位是（） kg/cm²。 Mpa。 bar。

You create a Web site that is for members only. The Web site allows members to create lists of users that have access to information about member profiles. The name of the list is stored in the listName variable. The user name of the user to whom access is given is stored in the username variable.You need to enable members to manage their lists of users.
Which code segment should you use?（）