Which idea is introduced in paragraph 1 and further developed in paragraph 2?
Responses
A The Big Bang occurred billions of years ago, creating all the matter in the universe.The Big Bang occurred billions of years ago, creating all the matter in the universe.
B The particles formed immediately after the Big Bang were tinier than a nucleus.The particles formed immediately after the Big Bang were tinier than a nucleus.
C Massive galaxies and tiny organisms came together due to the force of gravity.Massive galaxies and tiny organisms came together due to the force of gravity.
D Hydrogen and helium are the most common fundamental elements of the universe.