Former Atlanta mayor Ivan Allen, Jr., received the Martin Luther King, Jr., Nonviolent Peace Prize in 1981. Which BEST explains why Allen received the award?

Responses
A Allen was instrumental in increasing downtown construction.Allen was instrumental in increasing downtown construction.
B Allen was responsible for bringing major sports teams to Atlanta.Allen was responsible for bringing major sports teams to Atlanta.
C Allen helped arrange Martin Luther King’s funeral after his assassination.Allen helped arrange Martin Luther King’s funeral after his assassination.
D Allen helped keep Atlanta’s citizens calm during the Civil Rights Movement.

D Allen helped keep Atlanta’s citizens calm during the Civil Rights Movement.