J
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A The cells run out of growthfactors due to the crowding of neighboring cells
B THe cells reach the end of their reproductive life
C A clearing occurs that inhibits all cells in the culture
D Neighboring cells release cell division repressor factors
E The toxic waste products from other cells in the culture cause significant changes in the pH
B THe cells reach the end of their reproductive life
C A clearing occurs that inhibits all cells in the culture
D Neighboring cells release cell division repressor factors
E The toxic waste products from other cells in the culture cause significant changes in the pH