Which of the following statements best describes the characteristics of a Confirmed Irrevocable Letter of Credit?

A、Itcanberevokedatanytimebytheissuingbankwithouttheconsentofthebeneficiary.
B、Itisguaranteedbyasecondbank,addinganextralayerofsecurityforthebeneficiary.
C、Itrequiresthepresentationofcertaindocumentstobehonored,whichmakesitsimilartoaCleanL/
C、
D、Itisatypeofletterofcreditthatcanonlybetransferredoncetoanotherbeneficiary.