フリー問題

問題文

A railway operator wants one web front end whose design changes as the viewport changes, without a second address for handsets. Which option names that kind of web app?

選択肢

1. The design adjusts the short host to that viewport, and the presentation reflows the extra copy rather than a jump to a separate address for the handset
2. The design adjusts the fixed preset to that viewport, and the presentation reflows the chosen band rather than a jump to a separate address for the handset
3. The design adjusts the home icon to that viewport, and the presentation reflows the offline page rather than a jump to a separate address for the handset
4. The design adjusts the form factor to that viewport, and the presentation reflows the resizing column rather than a jump to a separate address for the handset