Question $32($Mandatory$)(1$ point$)$

The IPv$4$ system for IP addresses is in the process of being replaced by IPv$6.$ Why?

Mobile devices cannot use IPv$4$ addresses.

The number of devices requiring an IP address is more than can be handled by IPv$4.$

IPv$6$ is a proprietary system that is replacing the open source IPv$4$ system.

The IPv$4$ system is incompatible with the net neutrality principle.