C. Paul's mother and Grandma ...

Ответ (RU):

1. made lunch with apples.
2. picked flowers.
3. went fishing.

В тексте указано: "Then Paul's mother and Grandma cooked lunch with the fresh apples.".

Следовательно, правильный ответ: 1. made lunch with apples.

Ответ: 1. made lunch with apples