The phrase that represented the belief used to justify westward expansion of America's borders in the 1800s is "Manifest Destiny" which was used widely.
Pacifist protests showed that many people opposed u.s entry into the the war
Nullify means to quiet down, or silence,so we can infer that the word nullification is made of nullif witch is a greek or latin Root. So nullification decrides t<span>he states'-rights doctrine that a state can refuse to recognize or to enforce a federal law passed by the United States Congress.</span>
Your answer would be c i think