Which term corresponds to the definition 'technique used when only a small amount of blood is needed as a specimen for a blood test'?

• A. capillary puncture process
• B. capillary puncture equipment
• C. Sorting mail
• D. capillary puncture definition

Answer: (D)

The idea is the specific method used to obtain a small blood sample for testing. That method is capillary puncture, which involves puncturing small capillaries (typically at a finger or heel) to collect a tiny amount of blood. The term that best matches the provided description by linking the concept directly to its meaning is capillary puncture definition, since it specifies the defined concept of that technique. The other options either describe related aspects (like the process) or refer to equipment, or are unrelated to the technique itself.