フリー問題

問題文

Each order holds between one and sixty lines. The chosen model takes one row per order with a fixed set of columns. Two ways of flattening are offered: one column per possible line, or summary columns over the lines. Which explanation covers both effects?

選択肢

1. Laying out sixty numbered slots produces the mostlyempty matrix, while summary columns over the lines lose the itemlevel detail that documentation should list among the deliberate simplifications.
2. Laying out sixty numbered slots produces the compact matrix, while summary columns over the lines lose the basket detail that documentation should list among the deliberate simplifications.
3. Laying out sixty numbered slots produces the mostlyempty matrix, while summary columns over the lines lose the basket detail that documentation should list among the deliberate simplifications.
4. Laying out sixty numbered slots produces the compact matrix, while summary columns over the lines lose the itemlevel detail that documentation should list among the deliberate simplifications.