The correct answer is B) confederal.
The term that BEST describes the system of government FIRST used in the United States of America is confederal.
The Articles of the Confederation was the first form of Constitution in the United States. The Articles were written in 1777 but were ratified until 1781. The Articles stated that the states were sovereign and independent. The states could collect taxes. Congress, on the other hand, was very limited. It couldn't regulate commerce between the states, could not coin currency, and only could operate a post office or make alliances.