Answer:
C. have been walking
Explanation:
A is talking in past tense and B also has a past tense vibe.
Explanation:
The actual work of tattooing it on your skin would probably qualify like that but they also often do the design work on the tattoo itself (they would own the copyright to that). And if they don't do it then they adapt work from somebody else (who owns the copyright to the image).
The best opinion for your question is vibration