Final answer:
The normal blood pressure response during dynamic upright exercise is an increase in systolic blood pressure while diastolic pressure remains stable, aligning with option A.
Step-by-step explanation:
The normal blood pressure response to dynamic upright exercise consists of a progressive increase in systolic blood pressure with a stable diastolic blood pressure. Therefore, the correct answer is A) Systolic blood pressure with a stable diastolic blood pressure. During exercise, the body's demand for oxygen increases, and to meet this demand, the heart rate and stroke volume increase, which then leads to an increase in systolic blood pressure. This is necessary to facilitate the increased blood flow needed during physical activity. Diastolic blood pressure, however, remains relatively unchanged because the resistance to blood flow, or peripheral resistance, doesn't significantly change during aerobic exercises, as the blood vessels may dilate to accommodate increased blood flow.