Which statement is true regarding UDLD and STP timers?

Which statement is true regarding UDLD and STP timers?

A.
The UDLD message timer should be two times the STP forward delay to prevent loops.

B.
UDLD and STP are unrelated features, and there is no relation between the timers.

C.
The timers need to be synced by using the spanning-tree udld-sync command.

D.
The timers should be set in such a way that UDLD is detected before the STP forward delay
expires.