Sarah asks why Adnan cares if Jay got Stephanie a present. Adnan responds by saying that Stephanie was a close friend and he wanted to make sure she also got a gift from him because she wanted one from him. Why does Koenig ask this

Because Stephanie was dead.    

Explanation:

It is a story about a group of friends, Sarah Koenig, Adnan Syed, Jay and Stephanie.

Stephanie was a very close friend of Adnan and she loved Jay. It was January 13th and it was Stephanie's birthday. So Adnan wanted to give  a birthday present to Stephanie and also asked if Jay wanted to gift Stephanie a gift or something. Jay agreed to give a gift to her.

According to Adnan, Jay was supposed to go to the mall to buy a present and pick Adnan from the track practice at evening after school. But Stephanie was strangled and according to the police and her phone records, she was strangled in between 2:15 to 2:36 pm after the school, because people have seen her after the school going towards her car.

answer; (b) binge eating disorder;