Final answer:
4) all of the above: using compressed air, a cleaning solution, and a soft brush is necessary to effectively clean contaminants from the pitot tubes on the ACES II container.
Step-by-step explanation:
The correct answer is option 4, which comprises using compressed air, cleaning solution, and a soft brush. When cleaning contaminants from inside the pitot tubes on the ACES II container, it's essential to use a holistic approach to ensure that all contaminants are effectively removed without damaging any components.
Compressed air can be used to blow out loose debris, a cleaning solution specifically designed for aviation use can dissolve residues, and a soft brush can gently scrub away any remaining contaminants. This combination ensures a thorough cleaning while minimizing the risk of scratching or otherwise harming the sensitive interior surfaces of the pitot tubes.