The best answer to both the flatness and horizon problems is:
A)the Steady State Theory.
B)the GUT theory.
C)the inflationary epoch.
D)dark energy.
E)decoupling.

Question

Quizplus · Accepted Answer

The inflationary epoch is the best solution to both the flatness and horizon problems. During this period, the universe underwent an exponential expansion, causing it to become incredibly large and flat. This explains the uniformity of the cosmic microwave background radiation and the lack of curvature in the universe. The inflationary epoch predicts a brief period of exponential expansion in the early universe, which solves both the flatness and horizon problems. This rapid expansion smooths out the curvature of space-time, making it nearly flat and homogenous. It also allows distant regions of the universe, which were causally disconnected before inflation, to come into contact and achieve thermal equilibrium, thereby solving the horizon problem.

The Best Answer to Both the Flatness and Horizon Problems