What IPv6 address incorporates IPv4?

What IPv6 address incorporates IPv4?

A.
Starting ::ffff:

B.
Starting 0:0::ffff:

C.
Ending ::ffff

D.
Ending 0:0::ffff

Explanation:
Defining the Dual IP Stack

IPv4-mapped addresses have the first 80 bits set to 0 (note the double colon), the next 16 set to 1 (shown as ffff), and the last 32 bits populated by the
IPv4 address. These addresses look like IPv6 addresses, other than the last 32 bits, which are written in the customary dot-decimal notation. For
example, ::ffff:192.0.2.128 represents the IPv4 address 192.0.2.128.