Expressed powers are a. granted to the national government by the u. s. constitution b. granted to state governments by the u. s. constitution c. also referred to as concurrent powers d. also referred to as reserved powers

a. granted to the national government by the U.S. Constitution

Explanation:

Expressed powers  

The expressed power or the enumerated power or delegated powers , are listed in the Article l of section 8 in the constitution of the united states .  

The expressed powers that is listed in the Article one , include the exclusive federal powers and the concurrent powers which are shared with the states , all the powers are contrasted with reserved powers which only the state have .

Hence , according to the question , the correct option is a .

answer; the region experienced a surplus of food;