The Flatness Problem and Horizon Problem

The flatness problem and horizon problem

A) are solved if there was a sudden inflation of the universe at a very early time.
B) show that the universe cannot be described by the steady state theory.
C) show that dark matter must be a small fraction of the total mass of the universe.
D) imply that the universe was once much hotter than it is now.
E) imply that the inflationary theory is incorrect.