What Key Event Happened During the Decoupling Epoch

question 98

Multiple Choice

What key event happened during the decoupling epoch?

• A)Pairs of neutrons and protons were created.
• B)Electrons and positrons were created.
• C)Expansion cooled the universe enough that protons could capture electrons in orbit.
• D)Dark energy accelerated the cosmos on to infinity.
• E)The universe underwent a brief period of very rapid expansion.