You have the following requirements： - Ensure that the business tier can be updated without affecting the application tier. - Use the minimum role instance size that meets or exceeds the current server specifications. You need to recommend a topology for hosting the application in Windows Azure. What should you recommend？（）
A、 Deploy the application tier and the business tier to one role with two Medium instances.
B、 Deploy the application tier and the business tier to one role with two Large instances.
C、 Deploy the application tier role to a Medium instance. Deploy the business tier role to a medium instance.
D、 Deploy the application tier role to a Large instance. Deploy the business tier role to a Large instance.
