问题补充：
BRICS is the first letter of its five member counries. The five members are Brizil, Russia ,India and South Africa.
A. Canada
B. Australia
C. China
D. Ameica
答案：
A. Canada
B. Australia
(答案→)C. China
D. Ameica
解析：Canada加拿大；Australia澳大利亚；China中国；Ameica美国。句意：BRICS是它的五个成员国的首字母。这五个国家是巴西、俄罗斯、印度、中国和南非。结合语境及常识，可知选C。
