问题：

[单选] What is the recommended practice regarding UDLD when implementing it in all fiber-optic LANports？（）

A .  Adjust the default hello timers to three seconds for aggressive mode
B .  Enable it in global mode and on every interface you need to support
C .  Enable it in global mode to support every individual fiber-optic interface
D .  Enable it to create channels containing up to eight parallel links between switche