Which of the Following Is NOT Part of the Growing

Which of the following is NOT part of the growing chain of evidence that makes many astronomers suspect there is a black hole at the very center of the Milky Way Galaxy?

A) the motion of stars close to the center indicates that there is a mass of 4.6 million solar masses inside their orbits
B) the Hubble Space Telescope has shown us a visible-light image of an accretion disk at the center of the Galaxy
C) the existence of a strong radio source at the center whose size appears to be no larger than Jupiter's orbit
D) the fact that Sagittarius A is a stationary radio source, while objects around it appear to be in motion
E) the observation that matter in the central region continues to be falling in toward the center