Which of the Following Is True About Documentary Letter of Credit

Which of the following is true about documentary letter of credit as a method of payment?

A) It requires the buyer to pay the face amount either on sight or on a specified date in the future.
B) It involves the use of a draft, drawn by the seller on the buyer.
C) It represents the bank's guarantee to pay the seller, provided that the conditions specified in it are fulfilled.
D) It is the ideal method of payment because a company has immediate use of the money.
E) It involves wire transfers or the acceptance of credit cards.