A small group of travelers is meeting inside an ancient building, and the travelers need access to the Internet using their mobile devices. However, the group is in an area where Wi-Fi Internet is not available and cellular coverage is intermittent. One of the travelers has an unlimited cellular data plan and a strong consistent signal.

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.