【单选题】

Apply two layers of protective compound to prevent hydraulic fluid damage to the sealant.

A、Apply two kindreds of protective compound to shield the sealant from any harm caused by hydraulic fluiD.
B、In order to prevent damage to the sealant from hydraulic fluid, it is necessary to apply two layers of protective compounD.
C、To prevent hydraulic fluid from drowning the sealant, it is recommended to apply two layers of protective compounD.