Which simplified IPv6 address is the same as the IP address 2001:0000:1000:0000:0000:cbff:0020:0001/64?

Which simplified IPv6 address is the same as the IP address
2001:0000:1000:0000:0000:cbff:0020:0001/64?

A.
2001::1::cbff:2:0001/64

B.
2001::1000::cbff:20:1/64

C.
2001:0:1000::cbff:20:1/64

D.
2001:0:1:0:0:cbff:2:1/64