You are designing a Windows application by using Microsoft NET Framework 4, Microsoft Visual Studio 2010, and Microsoft SQL Server 2008
You plan to create a Windows Communication Foundation (WCF) service. The service will query a SQL Server database. The database will be replicated to four geographically separated database instances.
You need to ensure that the WCF service meets the following requirements
"II allows additional database instances to be added
"It routes users to the closest database server.
What should you do?
A. Implement context-based filtered routing
B. Implement content-based filtered routing
C. Store each database connection string in a local database instance.
D. Add each database server connection string to the Web configure
