What does the state-of-the-art computer simulation tell us about？A．How the Big Bang occurr

What does the state-of-the-art computer simulation tell us about？

A．How the Big Bang occurred about 13 billion years ago．

B．How“cosmic dark ages”came into existence．

C．How dust grains and gases were formed after the Big Bang．

D．How the first stars came into being after the Big Bang．