C. Harmful or injurious to health or physical well-being
A physical property of matter related to a materials ability to reflect light.
Answer:
Eunchner used a text written by Martin Luther King as a primary source and it is likely that he did not use any other primary source, since he does not cite any other documents in the text above.
Explanation:
A primary source is a document that reports on a historical event and that was built at the moment that this historical moment is happening. In the text above, we can see that the author references a text by King in relation to his position on the situation of blacks in America. It is likely that this reference is referring to a text written by Martin Luther King at the time of the marches in the name of civil rights, therefore, this text is a primary source.
However, the author does not cite any other documents, which indicates that King's text was the only primary source he used.
