Read the following context and choose the best option to answer the question.
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 ?
Options: 
A. They were looking for veins in their thumb .
B. None of the above choices .
C. They used a device to detect the vein .
D. They accidentally cut their thumb .


D