BBC Radio 1 was chosen to broadcast the radio trailer for a documentary. Radio 1 targets 15-29 year olds and plays popular music and interviews, aligning with the target audience of young people for the documentary. Although Radio 2 is very popular, most of its listeners are over 35 so it may not interest the target audience. Radio 3 focuses on classical music and arts and may not appeal to the target age range. Radio 4 discusses relevant issues but has a limited young audience. Therefore, Radio 1 was selected as the best option to directly reach young listeners.