Context: . . I do n't know if you have a main artery in your thumb but I found one . And I got it all bandaid - ed up .
Question: How did the writer find an artery in their thumb ?
Option 0: They injured their hand .
Option 1: None of the above choices .
Option 2: They used a device to detect the vein .
Option 3: They were looking for veins in their thumb .
Answer: 0