Read the following context and choose the best option to answer the question.
Context: Because 99 % of the time , after pouring my heart out to her back , she 'll turn around and give a piercing scream , all because she did n't know I was there ! Having a mom with a hearing loss is n't a trial , it 's just different . My brother and I adjusted just like my mom had to adjust to her hearing loss .
Question: Why did my mom give out a scream ?
Options: 
- She thought she was alone in the room .
 - She wanted to see my brother and me .
 - She wanted to make her scream piercing .
 - None of the above choices .


She thought she was alone in the room .