Answer:
The correct option is Option B i.e. a mutation that leads to individuals with genetic differences.
Step-by-step explanation:
The phenotype is the morphological character of an organism. Phenotype of a species depend on the genetic characteristics of the species itself, because all the characteristics are actually results of the genetic setup of the species.
So, a change in the genotype of the organism can bring massive changes in its phenotype. These genetic modifications are made up by the mutations.