The Inflationary Epoch Required an Enormous Amount of Energy

Multiple Choice

The inflationary epoch required an enormous amount of energy. What was the source of this energy?

A) The universe cooled as it expanded, releasing energy.
B) The universe made the transition from the false vacuum to the true vacuum, releasing energy.
C) The particles gained energy in the form of mass from the Higgs field.
D) Gravitons, released by the newly created gravitational field, provided energy.