What key event happened during the decoupling epoch? A) Pairs ...

[Wadzanai]

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.

Question 2

Mars' mass is only a tenth of the Earth's, and its density is also less than the Earth's.
 
  Indicate whether the statement is true or false

[fraziera112]

Answer to Question 1

C

Answer to Question 2

TRUE