(A) Content ID claims result in copyright strikes.
(B) Copyright takedowns allow you to automate the removal of infringing material.
(C) Copyright takedowns are official legal requests.
(D) Content ID claims only apply to future uploads.
Explanation
The key difference between Content ID claims and copyright takedowns is that Copyright takedowns are official legal requests which is a manual process whereas Content ID claims are unofficial requests and this is an automatic process.
Conclusion
This question is a part of the “Navigate conflicts and disputes” lesson from the Claims and policies unit and the “Manage your copyright online” lesson from the YouTube Content Ownership course.