Which Statement About Galactic Motions and Interactions Is MOST Likely

question 222

Multiple Choice

Which statement about galactic motions and interactions is MOST likely to be true?

• A) Galaxies occasionally collide with one another, particularly galaxies in clusters.
• B) Galaxies are so closely packed in the universe that they are always interacting with one another.
• C) The universe is composed of one giant galaxy of which all observed stars are members; thus, the question of interaction between galaxies is irrelevant.
• D) Galaxies are so widely separated that they never interact or collide.

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