How Does the Tenth Amendment Affect the Distribution of Power

How does the Tenth Amendment affect the distribution of power between the states and federal government?

A) It divides it equally between the national and state governments.
B) It separates power across the three branches of government.
C) It reserves power to the national government if not granted to the states.
D) It reserves power to the states if not granted to the national government.
E) It enumerates specific powers of the states and national governments.