Question

writing a state constitution is an example of
an implied power.
a reserved power.
a concurrent power.
an expressed power.

Explanation:

In the U.S. federal system, reserved powers are those not delegated to the federal government nor prohibited to the states, and are reserved for the states (or the people) per the 10th Amendment. Writing a state constitution is a core power of individual states, as it is not an enumerated (expressed) federal power, not a power shared with the federal government (concurrent), nor an implied federal power.

Answer:

B. a reserved power.