Three contributing factors that led to cyber bullying ​

gender, academic achievement, and culture

Explanation:

Research shows that gender is one of the main contributing factors to cyber bullying. This is because the male sex is usually more likely to bully females online and offline due to their stronger size.

Academic achievement and culture are also factors as some cultures view the male as being superior than the females which usually leads to varying types of bullying in the world at large.

i would say b. research typically uses a variety of sources