E. When did Paul go to see his grandparents? He went to see them... 1) on Friday. 2) on Saturday. 3) on Sunday.

Краткое пояснение:

В тексте сказано: 'On Sunday my family and I visited my grandmother and grandfather'. Это прямо указывает день посещения бабушки и дедушки.

Ответ:

3) on Sunday.