What is the difference between a zombie host and a reflector host?

A: Unlike a zombie, a reflector is a laundering host that fundamentally transforms and/or delays the attacker's communications before they continue down the attack path. (Zombie technique) B: Unlike a zombie, a Traceback through the stepping stone host requires determining if two communications streams, viewed at different points in the network, have the same origin and are essentially the same stream. (stepping stone Traceback technique) C: Unlike a zombie host, the reflector is an uncompromised host that cooperates with the attack in an innocent manner consistent with its normal function. D: A zombie is a version of a reflector host.