PLEASE HELP WILL MARK BRAINLIEST if a glass of water had 5 teaspoons of salt and the other glass has 10 teaspoons of salt which one dissolves the fastest

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.