![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
In Paragraph 2, 'the nations report card' is cited to show that
A.
too many high schools fail to accomplish the mission of teaching and learning.
B.
half of African-American and Hispanic high school students are dropouts.
C.
achievement gaps are the primary iauses of ethnic separation in America.
D.
American high schools haven't wiped off ethnic gaps among students.