Final answer:
A strong reflexive response is one characteristic of a newborn that indicates good physical condition on the Apgar Scale. Other criteria assessed include heart rate, muscle tone, respiration, and skin color.
Step-by-step explanation:
Using the Apgar Scale, a tool to assess the health of a newborn immediately after birth, five characteristics indicate that the baby is in good physical condition. Of the options presented, A) a strong reflexive response is one of the criteria that indicate a newborn is in good condition. Other characteristics include heart rate (with a score of 2 if it is above 100 beats per minute), muscle tone, respiration, and skin color.
The scoring is based on a scale of 0, 1, or 2 for each of the five criteria with a cumulative score of 8 to 10 considered normal for a newborn. It's important to note that a heart rate of under 100 beats per minute (option C) and shallow breathing (option D) are signs of a lower Apgar score. Weak movements (option B) would also be indicative of a lower score. The Apgar test is conducted at one minute and five minutes after birth using a stethoscope, without the need for any other instruments.