Return Nex 7 points When the Big Bang theory was first proposed, many scientists did not accept it because they did not believe there was enough evidence to support it. Which observation led to the Big Bang theory becoming more widely accepted by scientists? A. The universe appears to be shrinking. B. The universe appears to be expanding. C. The planets seem to move in elliptical orbits. O D. The planets seem to move backward in their orbits. ​