The powers not delegated to the united states by the constitution, nor prohibited by it to the states, are reserved for the states respectively, or to the people. which type of powers is this describing?

a. powers shared by both state and federal levels.
b. powers implied within the constitution.
c. powers held by the states alone.
d. powers clearly identified for the federal level.

Let's try the options.  Are these powers clearly identified for the federal level (D)? NO: in fact, they are NOT delegated to the US, as it says above.  D is incorrect--by the way, these powers are called express powers.  What about A, are they shared by the state and federal levels?  NO, because it is reserved for ONLY the states.  These powers are concurrent powers, A is incorrect.  Powers implied within the Constitution are given to the national government and called implied powers, B is incorrect.

But powers held by the states alone are called reserved powers because they are RESERVED for the states and people, as seen above!  C is correct.

C. Powers held by the states alone.