Available choices:
A). peat;
B). phytoplankton;
C). fields;
D). oil;
E). air;
F). pH;
G). sunlight;
H). elms;
Given those answer options, answer the question: Fact 1: Being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time. Fact 2: Well, a swamp is a type of wetland. Given the two facts above, being buried under soil and mud changes what into coal in wetlands over time?
A:
A).