سؤال قواعد ستيب محلول — اختيار الجملة الصحيحة (تدريب 4775)

To which sentence can we add the following phrase ? Having always spent their money to help others, (1)Sara and Ahmad were never able to save enough to perform their hajj. (2)Their granddaughter, Mona, was living in Makkah with her family. (3)She decided to invite them to come and stay with her. (4)Their pilgrimage would be possible at last, so the old folks were overjoyed.