What Does the Term 'Incongruent Unicast and Multicast Routing' Refer

What does the term 'incongruent unicast and multicast routing' refer to? (Choose the best answer)

A) This is another term for asymmetric routing
B) This refers to having different routing policies or routing topologies for unicast and multicast networks
C) This refers to the case when the base routing table imports routes from two different protocols
D) This refers to the case when unicast and multicast routing tables contain the same route entries