When making his projections on population, Malthus failed to foresee:
a.technological advances in agriculture that have resulted in larger yields.
b.the advances in medicine that prevented diseases from periodically wiping out en-tire nations.
c.that widespread use of contraceptives in many countries would keep the birthrate low.
d.all of the above
Answer is d.all of the above (Technological advances in agriculture that have allowed farmers to work larger plots of land and to grow more food per acre, resulting in substance levels that exceeded his predictions.)
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