Final answer:
Disposable instruments should be used to puncture or invade the skin to prevent infection.
Step-by-step explanation:
The correct answer is D. Disposable.
Tools and instruments used to puncture or invade the skin should be designed to be disposable. This means that they are meant to be used once and then thrown away. The use of disposable instruments helps to prevent the spread of infection, as using a new, sterile instrument for each patient reduces the risk of contamination. Examples of disposable instruments include hypodermic needles, lancets, and scalpels.