A escassez de endereços IPs promoveu a criação da técnica ...

Letra D.

As faixas de redes internas estão erradas. Na RFC1918 temos:

The Internet Assigned Numbers Authority (IANA) has reserved the
   following three blocks of the IP address space for private internets:

     10.0.0.0        -   10.255.255.255  (10/8 prefix)
     172.16.0.0      -   172.31.255.255  (172.16/12 prefix)
     192.168.0.0     -   192.168.255.255 (192.168/16 prefix)

( I ) - ERRADA. Redes Privadas:
8-bit block 10.0.0.0 – 10.255.255.255
12-bit block 172.16.0.0 – 172.31.255.255
16-bit block 192.168.0.0 – 192.168.255.255
16-bit block 169.254.0.0 – 169.254.255.255

d)

II e III

d-

ranges reservados NAT:

10.0.0.0 - 10.255.255.255 (10.0.0.0/8)

172.16.0.0 - 172.31.255.255 (172.16.0.0/12)

192.168.0.0 - 192.168.255.255 (192.168.0.0/16)

so lembrar 8, 12, 16

consoante RFC 1918:

The obvious advantage of using private address space for the Internet at large is to conserve the globally unique address space by not using it where global uniqueness is not required. Enterprises themselves also enjoy a number of benefits from their usage of private address space: They gain a lot of flexibility in network design by having more address space at their disposal than they could obtain from the globally unique pool. This enables operationally and administratively convenient addressing schemes as well as easier growth paths.

https://datatracker.ietf.org/doc/html/rfc1918