Question

five of the thirteen states voted for ratification of the constitution only after
a slavery was allowed to continue without federal interference
b several slave revolts rocked the carolinas and virginia
c they were assured that the supreme court would have the power of judicial review
d they were assured that a bill of rights would be added shortly after ratification
e the other states threatened to organize the government without them

Explanation:

Some states were concerned about the lack of protection for individual rights in the original Constitution. They agreed to ratify only when assured that a Bill of Rights would be added soon after ratification.

Answer:

D. they were assured that a Bill of Rights would be added shortly after ratification