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.
Ibn Saud was the first king of the Middle East, He was king of Saudi Arabia one of the poorest nations in the Middle East, but it quickly became one of the wealthiest due to discovery of oil reserves.