Two samples of water are prepared, one with red food coloring and one with blue. When carefully combined, the red-colored water is able to float on top of the blue-colored water. Which statement best explains this result?
a The blue-colored water is cooler and less dense.
b The red-colored water is hotter and less dense.
c The red-colored water is cooler and more dense.
d The blue-colored water is hotter and more dense.