Why were they referred to as the “Five Civilized Tribes”?

because they appeared to be assimilating to Anglo-American norms.

Explanation:

The term "Five Civilized Tribes" came into use during the mid-nineteenth century to refer to the Cherokee, Choctaw, Chickasaw, Creek, and Seminole nations. ... Americans, and sometimes American Indians, called the five Southeastern nations "civilized" because they appeared to be assimilating to Anglo-American norms.

people can eat food during that time

both are true, the congress does have the power to create banks, even if this power is not specifically described in the constitution, since there is nothing restricting it and there is power given to the congress to make "all laws which shall be necessary and proper". maryland was not allowed to tax a branch of the national bank operating there, and the supreme court decided that no state could. both of these topics were discussed in a decision of the mcculloch v. maryland case in 1819.