单选题 The state of Michigan now requires sports fans to make an annual ______ of $125 to $500 a seat to keep their end zone perches at Michigan Stadium.
A. tributary B. attribution
C. contribution D. distribution

【正确答案】 C
【答案解析】[解析] 形近识别。
contribution捐款，捐助，贡献；tributary(河川或湖泊)支流；attribution归因；distribution分配，分送。