<span>The preservation of anything
other than mineral skeletons is (with a few exceptions described below) an
extremely rare event. Anything that can decay is likely to be lost. Fur, skin,
internal organs – all are immensely vulnerable to the destruction by
bacteria, fungi and scavengers that assure their recycling back into the ecosystem. </span>
I believe the answer to your question is going to be C. 20
Hope this helps:)
<span>an arrow ..............................</span>
