フリー問題

問題文

Which two documented facts explain why a workflow does not start when a rollup column's value changes? (Select two.)

選択肢

1. Rollup columns are recalculated only when a user presses Recalculate, so there is no update event at all.
2. A workflow cannot be triggered by rollup column updates.
3. A workflow wait condition cannot use a rollup column.
4. Rollup columns are aggregated per user, so the workflow sees a different value.
5. Rollup columns cannot be referenced by business rules, so the workflow has nothing to read.