The FAA's duties include regulating airspace. Pilots need to understand airspace Classes A though G and should also know that ATC subdivides its assigned airspace among tower, approach and center facilities. Refer to this simulated NOTAM and the sectional chart illustration:

Minneapolis Center (Farmington MN) [ZMP]: October NOTAM #82 issued by Fort Dodge IA [FOD] Service(s) DES MOINES approach CONTROL out of service contact ZMP 125.65

Des Moines Class C

With the Des Moines approach control out of service, the Class C airspace ... [End the sentence with the best option.]


Remains unchanged


Reverts to Class D


Reverts to Class E


Reverts to Class G

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