What are three ways for a Salesforce administrator to meet this requirement?

Universal Containers has built a Partner Community for its users. Users must accept an agreement when logging into the community for the first time.

What are three ways for a Salesforce administrator to meet this requirement? Choose 3 answers Select one or more of the following:
A . Customise the user registration page to include the user agreement and "complete registration on acknowledgement"
B . Leverage audiences and the page variations to hide content in the Community until the user agreement has been accepted
C . Build a site.com page with a user agreement and replace the login page with "complete registration on acknowledgement"
D . Redirect users to a custom page displaying a user agreement before users login for the first time
E . Use login flows to show the user agreement when Community users log in for the first time

Answer: A,B,E