What type of Behavioural blocking can be utilized with 3rd-party AVs?

Answer options:

A.EDR with block mode
B.Feedback-loop blocking
C.Client behavior blocking
D.Malicious behavior blocking

Correct Answer: A
Option A is correct. EDR with Block mode allows you for blocking even when another AV is in use.
Option B, C, D are incorrect. Feedback-loop and Client behavior blocking is used with Defender AV.
Reference: 

https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/edr-in-block-mode?view=o365-worldwide