When Comparing International Assessments of Students' Achievement, the Relative Performance

When comparing international assessments of students' achievement, the relative performance of U.S. twelfth graders is

A) better than the performance of U.S. eighth graders.
B) about the same as the performance of U.S. eighth graders.
C) above the performance of their peers in top-ranked countries.
D) below the performance of their peers in top-ranked countries.