Claudette Colvin. Putting the nice middle-aged mom in front of the press for the crime of not sitting in the back of the bus? That resonates. Unwed teenage mom? Not so much.
Stuff like this is one of the 'criticisms' of the civil rights fighters. They chose, carefully, the people at the front for optics. Its also why all the black men being attacked by fire hoses and dogs in the pictures from the 1960's are wearing suits and their Sunday Church clothes.