问题: Accordingtothepassage,whichofthefollowingisthemostimportantfactorcausingtherapidextinctionofmanyspeciessincethe17thcentury?
A: Humanbeingsarenotawareoftheimportanceofpreservingendangeredspecies.
B:Someendangeredspecieshavealreadyreachedtheendoftheirlifespaninevolution.
C:Thedevelopmentofhumansocietyhasgreatlyaffectednaturalecologysystems.
D:Theworld’sclimatehaschangedgreatlythatmostspeciescannotsurvive.
