COGNITIVE ASSESSMENT What Is the Fundamental Difference Between IPv4 and IPv6

COGNITIVE ASSESSMENT What is the fundamental difference between IPv4 and IPv6?

A) An IPv4 address is 32 bits in length and an IPv6 address is 128 bits in length.
B) An IPv4 adddress has three parts that identify a specific computer; an IPv6 address has four parts that identify a specific computer.
C) IPv6 is widely used; IPv4 is beginning to be used more regularly and it is anticipated that IPv4 will replace IPv6 in a relatively short period of time.
D) IPv4 solves the problem of not enough IP addresses while IPv6 makes the problem worse.