What is the purpose of the talk？A．To explain a new requirement for graduation.B．To interes

What is the purpose of the talk？

A．To explain a new requirement for graduation.

B．To interest students in a community service project.

C．To discuss the problems of elementary school students.

D．To recruit elementary school teachers for a special program.

请帮忙给出正确答案和分析，谢谢！