Why should you protect your username and password information?
a) to prevent people from accessing your personal data
b) to prevent people from communicating with you
c)to prove keep secret information from parents
d) to avoid contact with students from other schools

Answer is A. (to prevent people from accessing your personal data)

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.