The correct answer is: B. T.R. Malthus.
Thomas Robert Malthus (1766-1834) was an English economist and demographer who is best known for his theory of population. Malthus argued that population growth is always geometric, while food production can only increase arithmetically. This means that population will eventually outstrip food production, leading to famine and starvation.
Malthus’s theory was controversial when it was first published, and it remains so today. Some economists and demographers argue that Malthus was wrong, and that population growth can be controlled through economic development and technological innovation. Others argue that Malthus was right, and that we are facing a global food crisis that will only get worse in the future.
David Ricardo (1772-1823) was an English economist who is best known for his theory of comparative advantage. Ricardo argued that countries should specialize in producing the goods and services in which they have a comparative advantage, and then trade with other countries for the goods and services that they do not produce as efficiently.
John Stuart Mill (1806-1873) was an English philosopher, economist, and politician who is best known for his utilitarianism. Mill argued that the best action is the one that produces the greatest good for the greatest number of people.
Jean-Baptiste Say (1767-1832) was a French economist who is best known for his law of markets. Say argued that supply creates its own demand, meaning that there will always be a market for goods and services that are produced.
In conclusion, the correct answer is: B. T.R. Malthus.