The DME counters are rotating continuously. This indicates that:
a. The DME is unserviceable
b. The DME is trying to lock onto range
c. The DME is trying to lock onto frequency
d. The DME is receiving no response from the ground station
a. The DME is unserviceable
b. The DME is trying to lock onto range
c. The DME is trying to lock onto frequency
d. The DME is receiving no response from the ground station