Why did diplomatic negotiations between the united states and mexico break down? a. mexico did not want to concede anything to the u. s. b. the u. s. refused to give $30 million to mexico. c. the u. s. would not accept the rio grande as the boundary. d. mexico refused to pay the united states.

It might be B or D, your welcome for the help

France played a key role in the american revolutionary war (american war of independence; 1775–1783). motivated by the ideals of the new nation which were inspired by the french enlightenment, as well as its long-term rivalry with britain and so as to avenge their territorial losses during the french and indian war, france secretly began sending supplies to the americans in 1775.