19. One cubic centimeter of iron (density ∼7.8g/cm3 ) and 1 cubic centimeter of aluminum (density ∼2.7g/cm3 ) are dropped into a pool, and they sink to the bottom. Which has the larger buoyant force on it?
(A) iron
(B) aluminum
(C) both are the same.
(D) neither has a buoyant force on it