I think it is the first one
Answer:
High heat can reduce the vitamin C content of the vegetables, and when heat and water are combined, as they are in boiling, you can see significant reduction of vitamin C. (One study found that boiling reduced the vitamin C content in broccoli by 45 to 64 percent.) This is because the vitamin is first leached out of the food into the water, and then degraded by the heat.
Explanation:
Capillaries connect arterioles and venules and enable the exchange of water, oxygen, carbon dioxide .