Which statement describes what happens when a switch enters dual active recovery mode?

Which statement describes what happens when a switch enters dual active recovery mode?
A . The switch shuts down and waits for the VSL link to be restored before sending traffic.
B . All interfaces are shut down in the formerly active virtual switch member, but the new active virtual switch forwards traffic on all links.
C . The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops.
D . The VSS detects which system was last in active state and shuts down the other switch.

Answer: B

Explanation:

In the dual active recovery mode, all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. The new active virtual switch continues to forward traffic on all links.

Reference: http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b.html