Which statement about Cisco ASA multicast routing support is true?

A.
The Cisco ASA appliance supports PIM dense mode, sparse mode, and BIDIR-PIM.

B.
The Cisco ASA appliance supports only stub multicast routing by forwarding IGMP messages
from multicast receivers to the upstream multicast router.

C.
The Cisco ASA appliance supports DVMRP and PIM.

D.
The Cisco ASA appliance supports either stub multicast routing or PIM, but both cannot be
enabled at the same time.

E.
The Cisco ASA appliance supports only IGMP v1.

Explanation:
http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/route_multicast.html#wp
1060775
Multicast routing is a bandwidth-conserving technology that reduces traffic by simultaneously
delivering a single stream of information to thousands of corporate recipients and homes.
Applications that take advantage of multicast routing include videoconferencing, corporate
communications, distance learning, and distribution of software, stock quotes, and news.
Multicast routing protocols delivers source traffic to multiple receivers without adding any
additional burden on the source or the receivers while using the least network bandwidth of any
competing technology. Multicast packets are replicated in the network by Cisco routers enabled
with Protocol Independent Multicast (PIM) and other supporting multicast protocols resulting in the
most efficient delivery of data to multiple receivers possible. The ASA supports both stub multicast
routing and PIM multicast routing. However, you cannot configure both concurrently on a single
ASA.