Complex Molecules in the Interstellar Medium Are Found

Complex molecules in the interstellar medium are found

A) only around the supergiant stars like Betelgeuse that make their heavy atoms.
B) on the surfaces of the coolest class K and M stars only.
C) uniformly throughout the disk of the Galaxy.
D) scattered evenly throughout the universe, a product of the Big Bang itself.
E) primarily in the dense dust clouds.