According to the statement above
"Based on this sentence from the first paragraph, how would Hamilton describe the current government? AFTER an unequivocal experience of the inefficiency of the subsisting federal government, you are called upon to deliberate on a new Constitution for the United States of America."
And the options:
A. Important
B. Unrivaled
C. Unnecessary
D. Ineffective
The answer is D.
So, the hey word that describes the current government according to the sentence is "inefficiency".