Please I need help 1. In which type of galaxy would you expect to find the most

Question

Please I need help

1. In which type of galaxy would you expect to find the most massive black hole: a dwarf irregular galaxy, a large spiral galaxy with a small bulge, or a large elliptical galaxy?(C)

A. A dwarf irregular galaxy has the smallest "bulge" of the three galaxies in the question, so it would be expected to have the largest massive black hole.

B. A large spiral galaxy with a small bulge has the smallest "bulge" of the three galaxies in the question, so it would be expected to have the largest massive black hole.

C. A large elliptical galaxy has the smallest "bulge" of the three galaxies in the question, so it would be expected to have the largest massive black hole.

D. A large elliptical galaxy has the largest "bulge" of the three galaxies in the question, so it would be expected to have the largest massive black hole.

E. A dwarf irregular galaxy is very different from the other two galaxies in the question, so it would be expected to have the largest massive black hole.

F. A large spiral galaxy with a small bulge is more difficult to see so it would be expected to have the largest massive black hole.

2. What evidence supports the existence of a black hole at the center of our galaxy? (C)

A. We observe an extremely bright X-ray source at the center of our galaxy.

B. We observe a large, dark object that absorbs all light at the center of our galaxy.

C. The motions of the gas and stars at the center indicate that it contains 4 million solar masses within a region only 3 light-years across

D. We can see gas falling into an accretion disk and past the event horizon of a black hole.

E. All of the above

Explanation / Answer

1)

A large elliptical galaxy has the smallest "bulge" of the three galaxies , so it would be expected to have the largest massive black hole

Correct option is C

2)

All the options given are evidences to prove the existence of black hole at the center of our galaxy.

correct option is E.

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