The China Beijing International Mining Exchange (CBMX) is publis

The China Beijing International Mining Exchange (CBMX) is publishing a new iron ore pricing index, an attempt to better reflect supply and demand as well as reduce price 【volatility】.
A、difference
B、decline
C、unpredictability
D、compensation
【正确答案】：C
【题目解析】：句意：北京国际矿业交易所公布了新的铁矿物价指数，试图以此更好地反映供求关系，减少价 格波动。volatility意为“波动，不稳定”。选项中difference意为“差别，差异”；decline意为“减少”； unpredictability意为“不可预见性，不稳定性”；compensation意为“补權”。故选C。