49. Which of the following is true about disadvantaged students? (A) They improved 3.2 percentage points in math from 2016 to 2017. (B) They improved 9.2 percentage points in language arts from 2016 to 2017. (C) They were disadvantaged because the school officials had been fiddling with data. (D) They had no problem competing with their counterparts from high-income families.