Mr. tolman believes that our universe is expanding, but with all of the gravitational force from the celestial bodies of space, the universe will begin to contract. he believes in the oscillating universe theory inflation theory steady state theory big bang theory

The correct answer is A. Oscillating Universe Theory.

Explanation

Mr. Richard Tolman was an American scientist who proposed a hypothesis about the universe oscillation that starts with the energy expansion, in the case of the universe that we know, the big bang, and ends with the gravitational attraction which causes the close up of all thing of the universe causing a final collapse. So the correct answer is A. Oscillating Universe Theory.

the revolution instituted a short-lived roman republic.