Heavy Rains and Mudslides Cause a River to Change Course

Heavy rains and mudslides cause a river to change course, isolating two groups of lizards from one another. If they remain isolated for a long period of time,_____________.

A) the groups will probably diverge genetically, and speciation may occur
B) one group will probably become an endemic species
C) one or both groups will probably become invasive species
D) both groups will probably become native species
E) one or both groups will probably emigrate