Which sentence from the article BEST supports the idea that Maya Angelou made many important contributions?
A. As an African-American, Angelou had a difficult time growing up there.
B. In the 1940s, Angelou moved to San Francisco, where she studied dance and acting.
C. After returning to the U.S., Angelou began writing "I know why the caged bird sings." The book tells the story of her years as a child and teenager.
D. In 2011, President Barack Obama awarded Angelou the nation's highest honor, the Presidential Medal of Freedom.
