A. world food production has kept pace with world population growth
B. technological innovation is one factor that allowed for an increase in crop production
C. complex genetic structure can hinder the efficacy of scientifically induced genetic mutation
D. the Malthusian limit might well have been reached if new methods to increase crop production had not been found
E. a Malthusian disaster would have been ensured if it were not for the invention of genetic engineering
我的答案: 无