Which of the Following Is TRUE

Which of the following is TRUE?

A) Separation of powers and federalism create multiple entry and blocking points through which policy advocates seek to influence the policy-making process in the United States.
B) The Constitution gives no guidance about the origins and outcomes of policy initiatives.
C) Mediating institutions like political parties and interest groups have developed in part to influence public policy by representing collective interests.
D) Because there is no centralization in the American policy-making process, policies may conflict with one another.
E) All of the above are true statements