What will happen if both detector loops in the forward cargo com

What will happen if both detector loops in the forward cargo compartment have failed while the rests are normal?

A.FAULT Light on the Fire Protection Panel illuminates.

B.DETECTOR FAULT Light on the Cargo Fire Panel illuminates.

C.A and B above

D.There is no alert. unless the annunciator is pressed to recall the fault.

正确答案是B