These are delegated powers of the national government that are spelled out very clearly:
a. inherent powers
c. implied powers
b. expressed powers
d. concurrent powers

Let's see: inherent and implied powers are the same thing--they are not spelled out in the constitution.  (A and C are wrong)  Concurrent powers ARE stated...but they are shared between the national and state governments.  (D is wrong)  EXPRESSED powers are delegated powers of the national government spelled out clearly.  (B is correct!)

B. expressed powers