Don't buy or use old infant cribs or other infant sleep equipment
A. without first checking that they meet the CPSC standards.
B. unless a family has given it to you after it was used.
C. at any time.
D. without testing it out first.

Eating right and exercising daily

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.

Heat exhaustion is the right answer