30% to 40% of the total number of new words in English vocabular

30% to 40% of the total number of new words in English vocabulary are produced through（ ）
A、affixation
B、clipping
C、compounding
D、shortening
【正确答案】：A
【题目解析】：本题主要考查词汇的构成。英语词汇中新单词总数的30%到40%都是通过词缀法产生的。