Final answer:
The vast majority of instruments are made from stainless steel due to its strength, hardness, and corrosion resistance, which makes it suitable for such applications.
Step-by-step explanation:
The vast majority of instruments are made from stainless steel. Alloy steels are used in the manufacture of many instruments because they provide strength, hardness, and resistance to corrosion. Different materials like brass alloys are utilized in musical instruments, aluminum alloys for their durability and good conductivity, and steel alloys are known for their durability.
Stainless steel specifically is the most common material used for instruments because it contains various amounts of elements like carbon, chromium, manganese, and nickel, which add to its strength and resistance to corrosion. Additionally, stainless steel is a practical choice for structural elements in instruments due to its durability and mechanical properties. Therefore, the answer is D) Stainless steel.