What is the default interval for a VRRP advertisement?

A.
1 second

B.
2 seconds

C.
10 seconds

D.
30 seconds

Explanation:
http://packetlife.net/wiki/well-known-intervals/#1-second

1 Second
Default VRRP hello timer
Default EAP-Identity-Request Timeout (Unified WLAN)
Default EAP-Request Timeout (Unified WLAN)
Default EAPOL-KEY Timeout (Unified WLAN)
CleanAir AP Sampling Interval (Unified WLAN)
Default Group Specific Query interval (Maximum Response Time of 10) for IGMPv2