Scientists use DNA sequencing to understand among life on earth. The chart illustrates differences between five species and humans. Although the DNA sequence of each may very, all BUT ONE statement concerning the organisms is true. (The answer choices are on the pic if u can see.)

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.