Final answer:
Issuing licenses is an example of a concurrent power in government, which is a power shared by both state and federal governments.
Step-by-step explanation:
An example of a concurrent power in government is C) Issuing licenses. Concurrent powers are those powers that are shared by both the state and federal government.
While powers like establishing post offices and declaring war are specifically delegated to the federal government, known as expressed powers or enumerated powers, issuing licenses falls under the category of concurrent powers because both state and national governments can exercise this power.
Other examples of concurrent powers include collecting taxes, borrowing money, and defining crimes and punishments.