How Does the Universe's Expansion During the Inflationary Era Differ

How does the Universe's expansion during the inflationary era differ from that in the classic Big Bang model?

A) During inflation, the curvature of the Universe changes.
B) During inflation, regions initially outside of causal contact are allowed to interact with each other.
C) During inflation, Hubble's law is violated.
D) During inflation, expansion makes the density closer to the critical value.