context: After shrinking during the 1970s and '80s, it expanded during the 1990s.
answer_0: However the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_1: By then the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_2: Meanwhile, the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_3: Therefore the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_4: Curiously, the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_5: Nationally, the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_6: Secondly, the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_7: Subsequently, the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_8: Certainly, the average reading and math scores of black high school seniors equal those of 8th-grade white students.
answer_9: Nonetheless the average reading and math scores of black high school seniors equal those of 8th-grade white students.