Answer: C. past violence
Although the poem "Song of Becoming" never explicitly states who the children are, or what specific things they have done, it does allude to some past violence. The poem states that their voices "are ones that reject, that knock down and build anew." It also tells us that they invade classrooms, streets and city quarters, "facing sullen tanks with streams of stones." The imagery of the poem shows that these people have engaged in acts of violence in the past.