Which of the following statements is true about decentralized peer to peer computing systems?

Group of answer choices

$($A$)$ Peer to peer search is anonymous: message forwarding does not reveal the originator of the message.

$($B$)$ Peer to peer search is deterministic: one can always find what you are looking for if the content exists in the system.

$($C$)$ Structured peer to peer systems $($DHT based$)$ is more secure than unstructured peer to peer systems.

$($D$)$ Unstructured peer to peer systems use broadcast based search protocol, and structured peer to peer systems use routing based search protocol.

$($E$)$ Decentralized peer to peer computing has no infrastructure cost.