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


B / Explanation:
A) By the end of grade 2 the average student knows approximately 6,000 root words. However, students in the lowest quartile know about 4,000 root words at this stage, while students in the highest quartile know up to 8,000 root words.
B) By the end of grade 2 the average student knows approximately 6,000 root words. However, students in the lowest quartile know about 4,000 root words at this stage, while students in the highest quartile know up to 8,000 root words.
C) By the end of grade 2 the average student knows approximately 6,000 root words. However, students in the lowest quartile know about 4,000 root words at this stage, while students in the highest quartile know up to 8,000 root words.
D) By the end of grade 2 the average student knows approximately 6,000 root words. However, students in the lowest quartile know about 4,000 words at this stage, while students in the highest quartile know up to 8,000 root words.

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