フリー問題

問題文

Finally the library asks what becomes of two clusters when a row in one beats the threshold against a row in the other, and how many rows the asset holds back when nothing further is stated. Which pairing states both correctly?

選択肢

1. When a row in one cluster beats the threshold against a row in the other the pair of clusters is merged, and with no further instruction the asset holds back some of the rows it grouped.
2. When a row in one cluster beats the threshold against a row in the other the pair of clusters is halved, and with no further instruction the asset holds back none of the rows it grouped.
3. When a row in one cluster beats the threshold against a row in the other the pair of clusters is merged, and with no further instruction the asset holds back none of the rows it grouped.
4. When a row in one cluster beats the threshold against a row in the other the pair of clusters is halved, and with no further instruction the asset holds back some of the rows it grouped.