Which size should you recommend?

You are designing a plan to migrate an existing application to Windows Azure.
The application currently resides on a server that has 768 MB of memory and multiple cores.
You need to recommend the smallest compute instance size that is equivalent to the existing server.
Which size should you recommend?

A.
Small

B.
Medium

C.
Large

D.
ExtraSmall

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