What can simultaneously solve both the flatness and horizon problems in cosmology?
A) GUT
B) quantum mechanics
C) TOE
D) inflation
E) dark energy

Question

Quizplus · Accepted Answer

Inflation theory proposes that the very early universe underwent an exponential expansion phase, during which the universe expanded rapidly and uniformly, smoothing out any irregularities that may have existed, thus providing a solution to the flatness problem. Inflation also explains the horizon problem by suggesting that distant regions of the universe were in close proximity to each other before the inflationary period, and were allowed to smoothly expand to their current distances, without having time to come into thermal equilibrium.

What Can Simultaneously Solve Both the Flatness and Horizon Problems