What might be a proper framework of a presentation?

A.Problem statement, introduction, proposed ideas, research findings and results, next steps of research, conclusion.

B.Problem statement, proposed ideas, introduction, research findings and results, next steps of research, conclusion.

C.Introduction, problem statement, proposed ideas, research findings and results, next steps of research, conclusion.

D.Introduction, proposed ideas, problem statement, next steps of research, research findings and results, conclusion.

正确答案：Introduction, problem statement, proposed ideas, research findings and results, next steps of research, conclusion.