Implementing Microsoft Azure Infrastructure Solutions (70-533)

 I am starting a blog to learn Implementing Microsoft Azure Infrastructure Solutions (70-533). For this purpose I am posting practice questions with answers from different dumps. The objective to achieve is to discuss if the answers are correct or incorrect. I need input from you people and it will also be helpful for those who intends to take this exam. First question with its topic is as follows;

Topic:  Encrypted Storage

Q-1: A company uses azure to host virtual machines and Web App. A line of business application that runs on a VM must use encrypted storage. You need to ensure that the VMs support the LOB application. What should you do?
A. Run the Add-AzureRmVmssSecret azure PowerShell cmdlet (adds secret to VM)
B. Scan the environment form the azure security manage.
C. Run the Test-AzureRmVMExtension azure PowerShell cmdlet (no such PS command)
D. Run the Set-AzureRmVMDiskEncryptionExtension azure PowerShell cmdlet

My Answer is : D