This is saying 3D SCAN, scans aren't recordings, they are essentially photos, so C. is incorrect. Stem cells don't need to rest on something while rescuing an organ, therefore D. is also improper. So, this leaves us with A. and B. B is the most proper because finding the best injection site you would need to find the organ's exact location, also.
<u><em>I am NOT a professional. There is a chance I am wrong. Please reply back to me with the correct response if needed. Thank you.</em></u>
