What Makes a "Publicly-Held" Corporation Different from a "Public" Corporation

What makes a "publicly-held" corporation different from a "public" corporation?

A) A publicly-held corporation has many shareholders, while a public corporation is a corporation owned by a governmental entity.
B) A publicly-held corporation is entitled to limited liability, but a public corporation is not.
C) A publicly-held corporation must have a charitable purpose, while a public corporation need not have a charitable purpose.
D) A public corporation is entitled to limited liability, but a publicly-held corporation is not.
E) Both terms have the same meaning.