thE Composition oF A plAnt Community ______.
A．DEpEnDs on ClimAtE AnD soil typE in A virgin EnvironmEnt unDAmAgED By humAn BEings
B．wAs grEAtly AFFECtED By humAn BEings BEForE thEy stArtED using ChEmiCAl suBstAnCEs on thE soil
C．wAs rADiCAlly trAnsFormED By unCivilizED humAn BEings
D．rEFErs to plAnts, trEEs, ClimAtE, typE oF soil AnD thE ECologiCAl EnvironmEnt