Which Power Shell command should you use?

You are the administrator for three Azure subscriptions named Dev, Test, and Prod. Your
Azure Power Shell profile is configured with the Dev subscription as the default. You need to
create a new virtual machine in the Test subscription by using the least administrative effort.
Which Power Shell command should you use?

A.
Option A

B.
Option B

C.
Option C

D.
Option D

Explanation:
http://msdn.microsoft.com/en-us/library/dn722499.aspx