然而，制造商可能会省略不适用于该产品的系统/章，或者在可行的情况下合并系统/章。
A.However, manufacturers may omit System/Chapters that are not applicable to the product or combine Systems/Chapters where it is feasible. B.However, manufacturers may adopt Systems/Chapters that are not applicable to the product or constitute systems/Chapters when necessary C.However, operators may omit Systems/Chapters applicable to the product or constitute Systems/Chapters where practical.正确答案A
