What Is the Difference Between a Public and a Private

What is the difference between a public and a private corporation?

A) Public corporations issue shares whereas private corporations do not.
B) Public corporations are owned by a government whereas private corporations are owned by private individuals.
C) Public corporations are always large whereas private corporations are not allowed by law to be large.
D) Public corporations have articles of incorporation whereas private corporations do not.
E) Public corporations issue shares that are widely held whereas private corporations issue shares that are held by only a few people.