A Genetics Professor Has Asked the Students to Simplify the Process

A genetics professor has asked the students to simplify the process of natural selection into a sequence of steps.Which sequence is correct?

A) competition for resources,reproductive success,frequency of genotype increases,selection of fittest genotype,environmental pressure
B) reproductive success,competition for resources,frequency of genotype increases,environmental pressure,selection of fittest genotype
C) selection of fittest genotype,competition for resources,environmental pressure,reproductive success,frequency of that genotype increases
D) environmental pressure,competition for resources,selection of fittest genotype,reproductive success,frequency of genotype increases