During vigorous exercise, d capillaries of the active muscles will be engorged with blood is the correct answer.
When you engage in intense physical activity, your body’s demand for oxygen and nutrients increases, particularly in the muscles that are actively working. To meet this demand, your heart pumps more blood, and the blood vessels, particularly the capillaries in the active muscles, dilate (widen) to allow more blood to flow through them. This process is known as vasodilation.
On the other hand, options a, b, and c are unlikely outcomes during vigorous exercise. While the skin may feel warm due to increased blood flow, it shouldn’t be cold and clammy, as that suggests inadequate blood flow or shock. Blood flow to the kidneys typically decreases during exercise, as the body prioritizes blood delivery to the muscles and vital organs. Similarly, blood is diverted away from the digestive organs, not to them, during intense activity, because the body focuses its resources on immediate physical demands instead of digestion.