For what reason has the IPv6 Type 0 Routing Header been recommended for
deprecation?

A.
When Type 0 traffic is blocked by a firewall policy, all other traffic with routing
headers is dropped automatically.

B.
It can conflict with ingress filtering.

C.
It can create a black hole when used in combination with other routing headers.

D.
Attackers can exploit its functionality to generate DoS attacks.

Explanation:
The functionality provided by IPv6’s Type 0 Routing Header can be exploited in order to
achieve traffic amplification over a remote path for the purposes of generating denialof-service traffic. This document updates the IPv6 specification to deprecate the use of
IPv6 Type 0 Routing Headers, in light of this security concern.
https://tools.ietf.org/html/rfc5095