How Do Government Corporations Differ from Private Companies

How do government corporations differ from private companies?

A) Government corporations perform activities that private companies cannot.-Consider This: Government corporations are distinct from other segments of the federal bureaucracy in part because of their ability to perform many of the same services as their private counterparts.This does not mean,however,that they function as publicly-traded companies do.
B) Government corporations need less government oversight than private companies.
C) Government corporations cannot sell stock,whereas private companies can.
D) Government corporations can borrow money,whereas private companies cannot.