The answer is C. The idiom best describes the process of finding small-scale ways to bring about large-scale changes. In other words, people should help in caring for the world by doing the best things to improve the environment within the proximity. The phrase "Think Globally, Act Locally" was first coined by René Dubos when he spearheaded the group of scientists in the <span>United Nations Conference on the Human Environment. </span>
B. Royalty living in the "Old World"
Why?
Because Irish Immigrants, Native Americans, and African Americans were all mentioned as dreamers in "Let America be America Again" but Royalty living in the "Old World" was not mentioned to be a dreamer in the poem. Therefore, the answer is B. Royalty living in the "Old World".