You administer a single server that contains a Microsoft SQL Server 2012 default instance. You plan to install a new application that requires the deployment of a database on the server. The application login requires sysadmin permissions.
You need to ensure that the application login is unable to access other production databases.
What should you do?
A . Use the SQL Server default instance and configure an affinity mask.
B . Install a new named SQL Server instance on the server.
C . Use the SQL Server default instance and enable Contained Databases.
D . Install a new default SQL Server instance on the server.
Answer: B