By the End of Grade 2, the Average Student Knows

By the end of grade 2, the average student knows approximately ________ root words, though the range for students from the lowest to the highest quartile at this stage can be from ________ to ________ root words.

A) 3,000; 1,500 to 4,500
B) 6,000; 4,000 to 8,000
C) 9,000; 8,000 to 10,000
D) 12,000; 10,000 to 14,000