Why would marian anderson's singing of "my country 'tis of thee" at the lincoln memorial in 1939 bring tears to the narrator's eyes? a) because that song is the narrator's favorite song that she used to listen to on the radio with her mother before she passed away b) because "my country 'tis of thee" is a very sad song that originated in a very sad time of american history c) because the lincoln memorial is a very sad location that reminds many people of the great loss resulting from lincoln's assassination d) because the song made a political statement about the country belonging to everyone--including african-americans