In the context of international finance, which of the following statements best describes the role of the U.S. dollar?
A) The U.S. dollar is only used as a domestic currency within the United States and does not influence international trade or financial markets.
B) The U.S. dollar is a major global reserve currency, widely used in international trade, finance, and as a benchmark for currency exchange rates.
C) The U.S. dollar is primarily a digital currency used only for online transactions and does not have a physical form.
D) The U.S. dollar is a currency that is exclusively used in North America and does not have significance beyond this region.