Spiral galaxies usually look like a bright color - white or blue. But, elliptical galaxies appear between gold and red in color. Why do the elliptical galaxies look that kind of color?
A. They contain more heavy kinds of stars than you find in spiral galaxies.
B. The color is because these galaxies are made of very long-lived stars, which glow those colors.
C. They have more dust that blocks the blue and green light more than the other colors.
D. Their stars have a significantly different average chemical composition than stars in a spiral galaxy.