Detailed Instructions: You are given a paragraph (Passage), a question (Question) and two answer options (Option1 and Option2). Your task is to find the correct answer (and return the string of the correct option, not option1/2) for the given question from the given options and based on the given passage. Answer of the question can be found directly from the passage.
Q: Passage: I was walking down the street with my phone in my pocket , when it began to vibrate . I pulled my phone out of the pocket and looked at the screen . The screen indicated that I was receiving an incoming phone call from my sister . I pressed the button on the screen marked '' accept '' to indicate that I wanted to accept the call . in a pleasant voice . My sister was calling to discuss the details of our upcoming family vacation this summer . I confirmed that I agreed with her hotel selections for our vacation . I told her that I was glad to have had a chance to have spoken with her , and that I would speak to her again soon . I pressed the button to end the call and hung up the phone . Question: Who did they say hello to? Option1: to each other Option2: to their mother
A:
to each other