Which statement best explains how nadine gordimer’s “once upon a time” reflects the author’s opposition to south african apartheid? a. the family’s refusal to feed the vagrants roaming around their neighborhood leads to their son’s tragedy. b. the family’s consideration of racism when hanging their warning sign proves that they are not actually racist. c. the family’s housekeeper and gardener could have prevented the tragedy in the end if they were better at their jobs. d. the family’s prejudice makes them take increasingly drastic security measures, which lead to their son’s tragedy.