Final answer:
Between 20% and 45% of adolescents experience cyberbullying each school year, with studies indicating about 28% of teens affected and a particular U.S. study showing 9% specifically encountering cyberbullying.
Step-by-step explanation:
The correct answer to the student's question is: Between 20% and 45% of adolescents in the United States, United Kingdom, Canada, and Australia experience cyberbullying during a school year. This is supported by various studies, including a report by the Cyberbullying Research Center, which found that about 28% of teens have been a victim of cyberbullying. Another study by the U.S. Department of Education in 2011 discovered that 27.8% of students aged twelve through eighteen reported experiencing bullying, with 9% specifically reporting having been a victim of cyberbullying. It's important to be aware of the prevalence of cyberbullying and understand the significant impact it can have on young individuals.