题目选项分析

After decreasing steadily in the mid-1990's, the percentage of students in the United States having finished high school or earning an equivalency diploma increased in the last three years of the decade, and rose to 86.5 percent in 2000 from 85.9 percent in 1999 and from 84.8 percent in 1998.

After decreasing steadily in the mid-1990's, the percentage of students in the United States who finished high school or earned equivalency diplomas increased in the last three years of the decade, to 86.5 percent in 2000 from 85.9 percent in 1999 and 84.8 percent in 1998.