Choose the Best Cause and Effect Sequence for the Process

Multiple Choice

Choose the best cause and effect sequence for the process of speciation by natural selection.

A) Variation --> Selection --> Reproductive Isolation --> Mutation --> Speciation
B) Mutation --> Variation --> Selection --> Reproductive Isolation --> Speciation
C) Speciation --> Reproductive Isolation --> Selection --> Mutation --> Variation
D) Variation --> Reproductive Isolation --> Speciation --> Mutation --> Selection