The correct answer is B.
OBJ-4.2: During the adversary’s actions on objective phase, the adversary is already deep within the victim’s network and has defeated all security mechanisms. If the adversary is attempting to exfiltrate data, implementing a quality of service approach could potentially slow down the rate at which information could be exfiltrated. This is considered a degradation to their effort by purposely manipulating service quality to decrease their transfer speeds. Honeypots could deceive an enemy during the actions on objective phase as the adversary may unknowingly take actions against a honeypot instead of their real objectives, but this would be classified as deception and not degradation. NIPS technologies serve to disrupt C2 channels, not degrade them. Audit logs may detect actions an adversary has taken after the fact but will not degrade the actions themselves.