Given below are four jumbled sentences. Select the option that gives their correct order.

A. Because their bodies were so well protected from decay in the permafrost, their genetic material remained intact.

B. Using their genetic material scientists at Harvard University are researching ways to bring the mammoth back to life.

C. The last mammoths lived as recently as 4,000 years ago.

D. Their well-preserved bodies can be found frozen in the tundra of Siberia.