You need to ensure that users in the eDiscovery group can view all discoverable content

A company uses SharePoint Online. The company has implemented eDiscovery.
You create a security group named eDiscovery.
You need to ensure that users in the eDiscovery group can view all discoverable content.
What should you do?

A.
Add the eDiscovery group as site collection administrators for every site collection that contains
discoverable content.
B Grant Full Control permissions to eDiscovery administrators.

C.
Grant the eDiscovery group access to content in all web applications by using a web application
user policy.

D.
Configure the eDiscovery center to use forms-based authentication.