What Is the Difference Between a Line of Credit and a Revolving

What is the difference between a line of credit and a revolving credit agreement?

A) A line of credit is normally used by charitable and public-sector organizations,while a revolving credit agreement is usually used by private-sector business firms.
B) More money can be borrowed with a line of credit than with a revolving credit agreement.
C) There is no guarantee that the money will be available when it is requested in a line of credit,but there is an agreement that it will be available when requested in a revolving credit agreement.
D) A line of credit is only obtainable from a credit union,while a revolving credit agreement is only obtainable from a bank.
E) All of these.