What is the purpose of Mrs. Harris visit to the headmaster？A．To make a special plea for fu

What is the purpose of Mrs. Harris visit to the headmaster？

A．To make a special plea for future cooperation.

B．To seek advice on her son"s major in college.

C．To show her regret at the school"s education.

D．To guarantee William"s security in school.

请帮忙给出正确答案和分析，谢谢！