Mesoamerica means Middle America, and it is the region from Mexico to around Costa Rica (from the options the best is "Middle America".) It's usually used to refer to the area as a cultural continuity of Pre-Columbian cultures.
They reinforced the power of the Federal govenrment by asserting the implied powers of the Congress in allowing for the creation of a national bank and by stating that states could not interfere with the power of the Congress to regulate interstate commerce. <u><em>Have a Great Day!</em></u>