Broad and Narrow Alley in Chengdu is _______ tourist attraction that thousands of people

A．so a well-known

B．a so well-known

C．such well-known a

D．such a well-known

（）是房地产投资信托基金和机构投资者进行商业房地产投资的主要物质载体。

A、居住物业

B、收益性物业

C、公共物业

D、所有物业