Final answer:
To complete the newborn screening card, a phlebotomy technician should touch the paper to a drop of blood to saturate each circle on the card, ensuring accuracy of the test.
Step-by-step explanation:
When a phlebotomy technician is collecting capillary blood from a patient for neonatal screening and needs to complete the newborn screening card, it is essential that the card is filled correctly to ensure the accuracy of the test. The correct action the technician should take to complete the newborn screening card is A. Touch the paper to a drop of blood and saturate each circle of the card. This method ensures the proper amount of blood is absorbed by the card and that the blood is evenly distributed within the designated area for analysis. It's important to avoid smearing or layering the blood, as this can lead to inaccurate results which could impact patient care.