【单选题】

For purposes of this specification, "airplane" refers to the airframe and related components specified in the Type Certificate or made available as options by the airplane manufacturer.

A、For purposes of this specification, "aircraft" means the relevant optional parts of the airframe and parts specified in the type certificate or supplied by the aircraft manufacturer
B、For the intention of this specification, " airplane" is know as the airframe selective components set forth in the Type Certificate or provided by the airplane producer.
C、For purposes of this specification, "aircraft" means the airframe and parts specified in the Type Certificate or the related optional parts supplied by the aircraft manufacturer.