Your company needs an inexpensive solution to host their AD data in the cloud. They do not need all of the features of AD but do need to be able to use it with WorkSpaces. Which of the following is the best recommended solution

Answer options:

A.Use Hosted Microsoft AD
B.Use the Simple AD service
C.Use the AD Connector
D.Deploy an AD server on a large EC2 instance

Answer – B
The AWS documentation mentions the following on Simple AD
Simple AD provides a subset of the features offered by Microsoft AD, including the ability to manage user accounts and group memberships, create and apply group policies, securely connect to Amazon EC2 instances, and provide Kerberos-based single sign-on (SSO). 
For more information on Simple AD please see the below link:
http://docs.aws.amazon.com/directoryservice/latest/admin-guide/directory_simple_ad.html