Question

which statement best describes the big bang theory? a existing objects in the universe move randomly and may collide in about 13.5 billion years. b galaxies in the universe move toward each other after an event that happened about 13.5 billion years ago. c objects in the universe are moving away from each other as a result of an event that occurred about 13.5 billion years ago. d galaxies within the universe collided about 13.5 billion years ago, forming the present objects in the universe.

Explanation:

The Big - Bang theory posits that the universe originated from a singularity and has been expanding ever since. Galaxies and other objects in the universe are moving away from each other as a result of the initial Big - Bang event which is estimated to have occurred about 13.8 billion years ago (close to 13.5 billion years in the context of this question).

Answer:

C. Objects in the universe are moving away from each other as a result of an event that occurred about 13.5 billion years ago.