The answer is B: <em>While some programs focus on assisting those who are affected by bulling, others concentrate on changing the behaviour of the bullies. </em>
This sentence fits logically before sentence 2 because both <em>sentences mention about school programs</em> <em>with the objective of stopping</em> <em>bullying</em>. Sentence 2 informs in a general way, and the other sentence specifies the <em>focus of each program:</em> a<em>ssisting the affected by bullying, and changing the behaviour of the bullies.</em>
