Which statement describes VRRP object tracking?

Which statement describes VRRP object tracking?
A . It monitors traffic flow and link utilization.
B . It ensures the best VRRP router is the virtual router master for the group.
C . It causes traffic to dynamically move to higher bandwidth links.
D . It thwarts man-in-the-middle attacks.

Answer: B

Explanation:

VRRP object tracking provides a way to ensure the best VRRP router is virtual router master for the group by altering VRRP priorities to the status of tracked objects such as interface or IP route states.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/xe-3s/fhp-xe-3s-book/fhp-vrrp.html