which statement is correct?

Regarding attacks, which statement is correct?

A.
Both DoS and propagation attacks exploit and take control of all unprotected network devices.

B.
Propagation attacks focus on suspicious packet formation using the DoS SYN-ACK-ACK proxy
flood.

C.
DoS attacks are directed at the network protection devices, while propagation attacks are
directed at the servers.

D.
DoS attacks are exploits in nature, while propagation attacks use trust relationships to take
control of the devices.