The sharp increase in the percentage of children living with single parents that began around 1960 has leveled off and was about the same in 2003 as it had been in 1990.

21/50

The sharp increase in the percentage of children living with single parents that began around 1960 has leveled off and was about the same in 2003 as it had been in 1990.

remained stable

increased slightly

reduce quickly

fluctuated

Giải thích

Giải thích : level off = khựng lại

remain stable = vẫn ổn định
increase slightly = tăng nhẹ
reduce quickly = giảm nhanh
fluctuate = dao động lên xuống , thay đổi thất thường

Vậy level off = remain stable . Đáp án A