The theory that explains the origin of the universe is the a) oscillating universe theory b) expanding universe theory c) quantum theory d) big bang theory

D) The big Bang theory. This focuses on the origin of the earth.

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3