Read the following context and choose the best option to answer the question.
Context: That would make the t - shirt that I had on at least nine years old . Then I started looking back farther for the shirt . Back more , and more , and more ... there are pictures of me in the shirt going back to 1992 .
Question: How old is the shirt ?
Options: 
- I just got it .
 - It 's older than I know .
 - I only got it for a while .
 - None of the above choices .


It 's older than I know .