Read the following context and choose the best option to answer the question.
Context: My gf said last night that she was going to be in all day , I just called her house # , and her brother picked up saying she was out at a friends house named * * * * * * * * * * * * a female friend . When I try to call my gf mobile # it just rings , iv tried to call her about 4 times on her mobile with no answer . It rings but there is no voice mail at the end , it rings about 5 times than sounds like a disconnecting sound . Any thoughts on what s going on .
Question: What may happen after they call their girlfriend 's house ?
Options: 
- None of the above choices .
 - They will track down their girlfriend using an app .
 - They will ask their friends about their girlfriend .
 - They will try to track down her location .


They will try to track down her location .