What does the blood carry to all the tissues and cells in your body? a. None of the above
b. Food and water
c. Food, water, oxygen, and other materials
d. Energy, water and food

Which situation is the best example of opportunity cost? a country chooses to produce bananas instead of wheat. a country chooses to invest in manufacturing and agriculture. a country chooses to specialize in producing paper products. a country chooses to export all of its products.