Which of the Following Research Designs Is Less Likely to Gain

Which of the following research designs is less likely to gain ethical approval for studying adolescents' responses to mild bullying behaviours?

A) An experimental design that exposes adolescent participants to mild bullying behaviours
B) Observation of naturally occurring events of bullying at the school setting
C) Individual interviews with adolescents who have been victims of bullying at school
D) A questionnaire survey about responses to bullying among an adolescent population