What Was Thomas Malthus's Contribution to Natural Selection

Multiple Choice

What was Thomas Malthus's contribution to natural selection?

A) the binomial taxonomic system of naming species
B) the theory that the Earth's old age is based on geologic evidence resulting from cataclysmic events
C) the observation that an abundance of food would allow a population to increase geometrically and indefinitely,but there simply is not enough food so populations are limited by food supply
D) the theory that environmental resources increase in response to population pressures