What should you recommend?

An on-premise application includes an application tier and a business tier.
The tiers are currently hosted on separate servers.
Each server has 4 CPU cores and 6 GB of memory.
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.

Explanation:
http://msdn.microsoft.com/en-us/library/windowsazure/ee814754.aspx

Virtual Machine Size CPU Cores Memory Disk Space for LSR in Web and Worker Roles Disk Space for LSR in a VM Role Allocated Bandwidth (Mbps)
ExtraSmall Shared 768 MB 19,480 MB (6,144 MB is reserved for system files) 20 GB 5
Small 1 1.75 GB 229,400 MB (6,144 MB is reserved for system files) 165 GB 100
Medium 2 3.5 GB 500,760 MB (6,144 MB is reserved for system files) 340 GB 200
Large 4 7 GB 1,023,000 MB (6,144 MB is reserved for system files) 850 GB 400
ExtraLarge 8 14 GB 2,087,960 MB (6,144 MB is reserved for system files) 1890 GB 800

Pricing and Metering for Compute:
Each compute instance is a virtual server. There are 5 compute virtual server sizes you can choose from. The table below summarizes the resources provided by each Compute instance size.
Virtual Machine Size CPU Cores Memory Cost Per Hour
Extra Small Shared 768 MB $0.02
Small 1 1.75 GB $0.12
Medium 2 3.5 GB $0.24
Large 4 7 GB $0.48
Extra Large 8 14 GB $0.96