Concerning the idea of American exceptionalism, we've learned that a handful of varying meanings have been attached to the term over the course of the 20th-21st centuries. One of these, the belief that it represented a 'national responsibility' to lead the free world, evolved during: a.)
late 1990's
b.)
1950's
c.)
1920's-1930's
d.)
the Obama-era

rjunm

Explanation:

mfdkfdnjf

independent innovation during the abbasid caliphate

roosevelt, a progressive reformer, earned a reputation as a "trust buster" through his regulatory reforms and anti-trust prosecutions. his "square deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.