One Example of the Inadequacies of the Articles of Confederation

One example of the inadequacies of the Articles of Confederation was the inability of the United States to

A) prevent English annexation of Florida.
B) force England to withdraw its troops from American soil after the Revolutionary War.
C) force England to abandon military posts it built beyond the boundaries of the original thirteen states.
D) prohibit French settlers from claiming American land in the Ohio River Valley.