What is the name of the power-sharing system of government adopted by the united states in which individual states are permitted to enact laws that reflect the values of their inhabitants?

Amember of congress who wants to act on what the majority of his or her constituency thinks on a particular issue would be advised to respond to which of the following indicators? a. letters from constituents b. the editorial positions of newspapers in the constituency c. public demonstrations by constituents d. a poll based on a random sample of constituents e. the number of yard signs on major streets