单项选择题

A.Install the Server Core installation of Windows Server 2008 R2 Standard on two servers. Configure the servers in a Network Load Balancing cluster.
B.Install the full installation of Windows Server 2008 R2 Web on two servers. Configure the servers in a Network Load Balancing cluster.
C.Install the full installation of Windows Server 2008 R2 Enterprise on two servers. Configure the servers in a failover cluster.
D.Install the full installation of Windows Server 2008 R2 Datacenter on two servers. Configure the servers in a failover cluster.