You are working in Air Canada's OCC. An Air Canada flight X062 was performing a flight from Toronto to Montreal, at top of descent the crew declared a PAN PAN call due to an indicator of fire in the cargo hold of the aircraft. The aircraft landed safely and emergency services indicated no presence of fire or smoke. All passengers disembarked with no injury or damage to the aircraft. What category would best suit this situation for your airline?

a. CAT A
b. CAT B
c. CAT C
d. CAT D
e. CAT E
f. CAT F
g. CAT G