Answers for this would be more helpful if you googled this or look at the instructions that should be included in or on the box of the pregnancy test.
Hope this helps! ^^

Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body.

:)
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Health information technician
i think its C just thinking it would be