【单选题】

CAP supplements the airplane's maintenance manual (or Instructions for Continuing Airworthiness) which is the primary document containing the procedures for the continuing airworthiness of the airplanE.

A、The supplements of CAP are the airplane's maintenance manual (or Instructions for Continuing Airworthiness). The CAP is the primary document containing the aircraft's continuous airworthiness procedures.
B、The airplane's maintenance manual (or Instructions for Continuing Airworthiness) serves as the main document that contains the procedures to ensure the continuing airworthiness of the airplanE. CAP is a supplementation to the manual.
C、CAP supplements the airplane's maintenance manual (or Instructions for Continuing Airworthiness). The supplements are the major document and involve in the procedures for the continuing airworthiness of the airplanE.