"Birmingham Sunday" is a song written by Richard Fariña. The song discusses the bombing of the 16th Street Baptist Church in 1963 by Ku Klux Klan members. They killed four girls and injured 22 others.
"Ballad of Birmingham" is poem describing an African-American mother and her daughter. They talk about "Freedom March" in the streets of Birmingham. The daughter wants to participate in the march, however mother says that it is dangerous. Mother then sends her daughter to church. After her daughter leaves for church, an explosion is heard. The young girl loses her life as a result. The poem has a literal connection with 1963 Church Bombing which is described in the Birmingham Sunday.
Easily, the correct answer is B.