Whích two statements best explain the author's purpose for writing the passage?
A.to highlight the embarrassment felt by students who put forth a lot of effort
B.to encourage praise for students' effort in order to promote academic success
C.to offer a reason for the poor performance of American students in school
D.to show that intelligent students learn differently than hardworking students
E.to prove that Americans have much to learn from students in other countries
(Multiple choice)