Read the following article and answer the question by choosing from the options.

He closed his eyes , turning away and gently pushing Hisa back into the hotel room . Tears still falling freely , he packed their bags and called the front desk , telling them he was checking out . Once he 'd packed Hisa 's little pink backpack and his duffle bag , he double checked the room and they walked out , locking the door and going by the office , dropping the key off .

Why Hisa could not pack her backpack herself ?
Possible answers:
(a). None of the above choices .;
(b). Hisa 's backpack was already packed .;
(c). She is a child and she could forgot something .;
(d). She was not in the room with him .;...A:
(c).