When ILS approaches are in progress, the controller may ask the

When ILS approaches are in progress, the controller may ask the pilot to “hold short of the ILS critical area”. This does not imply that _______ .

A.the runway in use is equipped with ILS

B.the ILS signals might be interfered if the airplane proceeds beyond the ILS hold lines

C.the ILS for the runway in use is out of service

D.there may be another aircraft making an ILS approach

正确答案是C