Which Step is the Last in the Formation of Fossil

Question

Which step is the last in the formation of fossil fuels?
A)subjecting organic matter to extreme pressure
B)flooding swamps with seawater
C)incomplete decomposition of organic matter
D)subjecting organic matter to extreme heat and pressure

Accepted Answer

The last step in the formation of fossil fuels involves subjecting organic matter to extreme heat and pressure, which transforms it into coal, oil, or natural gas over millions of years.