1. 8212. Which tubings have the characteristics (high strength, abrasion resistance) necessary for use in a high pressure (3,000 PSI) hydraulic system for operation of landing gear and flaps? A. 2024-T or 5052-0 aluminum alloy. B. Corrosion-resistant steel annealed or 1/4H. C. 1100-1/2H or 3003-1/2H aluminum alloy.