What Is the Difference Between a Common Carrier and an Electronic

What is the difference between a common carrier and an electronic publisher?

A) A common carrier may examine content before distributing it; an electronic publisher may not.
B) A common carrier is not allowed to import any foreign programming; an electronic publisher may.
C) A common carrier may not transmit video images; an electronic publisher can send both analog and digital images.
D) A common carrier must offer at least part of its services on a first-come, first-served basis; an electronic publisher can pick and choose its channels.
E) There is no difference between a common carrier and an electronic publisher.