问题：

[单选]

All servers in your environment run Windows Server 2008 R2. All client computers ru n Windows 7. Each client computer has at least 2 5  GB free disk space.
You virtualize applications by using Microsoft Application Virtualization (App - V). The App - V client cache is set to 4096 MB. User profiles are virtualized and stored on a server.
You ne ed to increase the size of the file system cache on a client computer to at least 10 GB.
What should you do?（）

A . Use the AppVCacheSize tool to set the maximum cache size to 10240.
B . Use the AppVCacheSize tool to set the minimum free disk space threshold to 1 0240.
C . Set the HKLM \ SOFTWARE \ Microsoft \ SoftGrid \ 4.5 \ Client \AppFS\ State registry key to 10240.
D . Set the HKLM \ SOFTWARE \ Microsoft \ SoftGrid \ 4.5 \ Client \AppFS\ FileSize registry key to 10240.