在中华人民共和国飞行情报区内飞行，航空器必须按照批准的航路、机场飞行。(汉译英)

【单选题】
A （A）All aircraft flying within the FIAs of the People's Republic of China are required to operate along the approved airways and at the designated airports.
B （B）All aircraft flying with the FIAs of the People's Republic of China required to operate along the approved airways and at the designated airports.
C （C）All aircraft flying with the FIRs of the People's Republic of China required to operate along the approved airways and at the designated airports.
D （D）All aircraft flying within the FIRs of the People's Republic of China are required to operate along the approved airways and at the designated airports.

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