By definition, genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance. A characteristic of this type of mechanism of evolution is that this occurs in all populations of non-infinite size. In fact, its effects are strongest in small populations. In short, genetic drift is a random fluctuation of allele frequencies between generations resulting from a gene lottery that occurs during gamete transmission in finite populations.
We can conclude that the correct answer is:
Answer:C) small