Which of the following was necessary before the U.S. Constitution went into effect?
A.
It needed to be accepted by 9 of the 13 states.
B.
It needed to be accepted by all the American voters.
C.
It needed to be accepted by all 13 states.
D.
It needed to be accepted by the Supreme Court.
So the rule was that the 9 out of 13 states at that time needed to come to the approval before U.S Constitution went into affect. The correct answer would be: Option D, It needed to be accepted by the Supreme Court.