What could prevent certain cases of cancer? (kind of think its c or d)

using air conditioning

covering the mouth when coughing

using antibiotics regularly

avoiding secondhand smoke

Avoiding secondhand smoke can help prevent lung cancer. 

Unlike  ct scans, which use x-rays,  mri scans  use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.  differences between  normal and abnormal tissue is often clearer on an  mri  image than a  ct.you can see more with a mri scan. for example on an mri you can see internal bleeding.

Positive roles models does great things and novitiate people bad role models does bad things