A US company is looking to acquire Japanese and a Japanese company is looking to acquire U.S. dollars, these two companies could perform a _______. Because the Japanese company likely has better access to Japanese debt markets and could get more favorable terms on a yen loan than if the U.S. company went in directly to the Japanese debt market itself, and vice versa in the United States for the Japanese company. （ ）
选项：

A:currency futures contract
B:currency forward contract
C:currency option contract
D:currency swap