Genetic drift was not first proposed by Charles Darwin. Thus the correct option is B.
Genetic drift is defined as the random fluctuations in the numbers of gene variants in a population. Genetic drift takes place when the occurrence of variant forms of a gene, known as alleles, increases and decreases by chance over time.
Genetic drift is at the core of the shifting-balance theory of evolution coined by scientist Sewall Wright where it is part of a two phase process of adaptation of a subdivided population. Charles Darwin gave the theory of natural selection.
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