In which three ways is an IPv6 header simpler than an IPv4 header? (Choose three)

In which three ways is an IPv6 header simpler than an IPv4 header? (Choose three)
A . Unlike IPv4 headers, IPv6 headers have a fixed length
B . IPv6 headers use a smaller Option field size than IPv4 headers
C . IPv6 uses an extension header instead of the IPv4 Fragmentation field
D . IPv6 headers use a 4-bit TTL field, and iPv4 headers use an 8-bit TTL field.
E . IPv6 headers use the Fragment Offset field in place of the IPv4 Fragmentation field
F . IPv6 headers eliminate the Pv4 checksum field

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Answer: ACF