Our beautiful America was built by a nation of strangers. From a hundred different places or more they have poured forth into an empty land, joining and blending in one mighty and irresistible tide. The land flourished because it was fed from so many sources—because it was nourished by so many cultures and traditions and peoples.

The above text was said by Lyndon B. Johnson on the day the immigration law was signed and became effective on October 3, 1965.

Explanation:

The excerpt shown above was spoken to reinforce the argument that America was created and became a powerful and admired nation because of countless immigrants who left their countries and to America and helped to create the country. For this reason, there is a commitment by Americans to current immigrants who seek, once again, to contribute to the construction of America and because of their ancestry, Americans must meet this responsibility and that is why the immigration law was sanctioned.

c. the animal imagery that follows the description of the dagger

explanation:

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: