社区的教育资源分为有形和无形两种，以下属于有形教育资源的是（）

A.社区意识

B.信息

C.社区归属感

D.社区氛围

The clearinghouse’s futures position is relatively low-risk because:()

A. all its obligations to deliver are matched to other investors’ obligations to make delivery. 

B. it is highly capitalized and backed by large credit lines. 

C. of both A and B.