A company currently has 50 employees and would like to use a directory service in AWS. Which of the following would be best suited

Answer options:

A.Simple AD
B.AD Connector
C.Microsoft AD hosted on an EC2 Instance
D.Microsoft AD

Answer - A
Since the foot print is small , the Simple AD service should suffice.
The AWS documentation mentions the following on the Simple AD
Simple AD is a standalone managed directory that is powered by a Samba 4 Active Directory Compatible Server. It is available in two sizes.
· Small - Supports up to 500 users (approximately 2,000 objects including users, groups, and computers).
· Large - Supports up to 5,000 users (approximately 20,000 objects including users, groups, and computers).
For more information on Simple AD, please refer to the below URL:
http://docs.aws.amazon.com/directoryservice/latest/admin-guide/directory_simple_ad.html