When world war 1 was beginning in Europe, the United States was trading profitably with
AThe triple entente and the triple alliance
BThe triple entente and the concert of Europe
CThe triple alliance and concert of Europe
DThe concert of Europe and the central powers
AThe triple entente and the triple alliance
BThe triple entente and the concert of Europe
CThe triple alliance and concert of Europe
DThe concert of Europe and the central powers