Volunteers ______people ______the neighbourhood _____ different problems this weekend.

A．help; in; with

B．will help; in; with

C．are going to help; with; in

D．are helping; in; with

工业企业向金融、房地产行业扩展，属于（）。

A.纵向多元化

B.横向多元化

C.相关多元化

D.无关多元化