フリー問題

問題文

The three routes have been feeding the platform for a month, and a member asks how the very first transfer differed from the ones that follow. What was different?

選択肢

1. The first run holds every existing row while later runs take the unchanged ones afterwards.
2. The first run holds every existing row while later runs take the altered ones afterwards.
3. The first run holds every deleted row while later runs take the unchanged ones afterwards.
4. The first run holds every deleted row while later runs take the altered ones afterwards.