I believe the answer is: <span>. Institutional Review Board (IRB)
</span><span>. Institutional Review Board (IRB) was initially created in order to prevent the abuse that happened in many method of research in 20th century..
</span>Because of this institution, researchers nowadays have to follow very strict standards that would limit what they can and couldn't do in their research.
Danger zone is between 4 and 60 degrees C.
Below 4 degrees (refrigerator is between 0 and 4), bacteria grow very slowly.
Above 60 degrees, (most) bacteria will be killed.
Below freezer temperatures (-18), bacteria stop multiplying.
That is why between 4 and 60, it is the danger zone for food safety.
By the way, please put an underscore where you expect an answer. Otherwise it looks like an incomplete sentence, like "....<span> for safety food is considered to be___________" Thank you.
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