Because of climate change, the ice that polar bears depend on for survival       .

A．are slowly disappearing

B．is slowly disappearing

C．are slowly disappeared

D．have slowly disappeared

《中华人民共和国招标投标法》规定，属于招标文件、招标过程和中标结果争议的，发生招标投标争议时，投标人可不经( )而直接采取投诉的方式。

A．异议

B．协商

C．调解

D．质疑

E．仲裁