Which of the following best describes the role of banks in international settlement?

A、Banksonlyprovideloanstobusinessesforinternationaltrade.
B、Banksfacilitateinternationaltradebyprovidingforeignexchangeservicesandensuringsecuretransactions.
C、Banksactasintermediariesonlyindomestictransactions.
D、Bankshavenosignificantroleininternationaltradeandtransactions.