Which of the following was not a lasting contribution of the u. s. constitution? a. separation of powers b. system of federalism c. abolishment of slavery d. establishment of the judicial branch

Im not 100% this is right,but B.system of federalism

Federalism - the sharing of power form the central government to the states
the in turn creates delegated power which is the power of states
all federal law overpowers state law
if the is a problem between 2 states it become a supreme court problem

i don’t think this answers your question but it might help