Which of the following descriptions is correct about the structured $($DHT$-$based$)$ peer to peer systems as described in our course material?

Group of answer choices

$($A$)$ Both unstructured and DHT based peer to peer overlay networks are self$-$organizing and self$-$healing.

$($B$)$ Global data placement is required for DHT based peer to peer systems.

$($C$)$ Search in DHT based P$2$P systems is non$-$deterministic.

$($D$)$ Structured peer to peer systems are resilient to targeted DDoS $($distributed denial of service$)$ attacks.

$($E$)$ Search is more efficient in DHT based peer to peer systems.