A. Mary chose to celebrate the birthday 1) at home with her family. 2) at a restaurant with friends. 3) only with her closest friends. 4) outdoors in the countryside.

Решение:

• Предложение «Last year Mary celebrated her birthday in a way she will never forget. Instead of having a party at home or at a restaurant she decided to organize a picnic in the countryside with her closest friends and family.» прямо указывает на место празднования.

Ответ: 4) outdoors in the countryside.