According to some experts, the exact number of homeschooled children in the US in the last year of the 20th century must be _____. A. 1,600,000 B. 850,000 C. 1,900,000 D. 1,700,000

Đáp án D

Thông tin nằm ở đoạn 1: “In fact, the U.S. Department of Education has estimated that in 1999, about 850,000 children were being homeschooled. Some educational experts say that the real number is double this estimate, and the ranks of homeschooled children seem to be growing at the average rate of about eleven percent every year.”