Which of the following NOT evidence for the existence of dark matter? Select one alternative:
O A. Systems like the Bullet Cluster that show that the gravitational field of a cluster can be separated from its gas content.
O B. The rate at which the outer parts of galaxies rotate about the centres.
O C. The stability of clusters of galaxies.
O D. The formation of "structure" in the Universe.
O E. The apparent acceleration of the expansion of the Universe.
