One oder ones?

Wähle „one“ oder „ones“ für die markierten Satzteile aus.
Jake is at the market (Part 1)

1 I would like some apples. The red apples look nice.
2 Which apples did you say? The green apples? /
3 No, the red apples. Can you give me three please?
4 Yes, of course. Are these small apples OK?
5 Or would you prefer the larger apples?
6 I'll take this apple.