Which of the Following Could Result in the Founder Effect

Which of the following could result in the founder effect?

A) the establishment of a small colony of nonhuman primates on an isolated island off the coast of Africa
B) the introduction of a new predator that rapidly decreases the population of nonvenomous snakes on a Caribbean island
C) the formation of a land bridge between two barrier islands in South Carolina allowing for interbreeding between two populations of salamanders
D) the inbreeding and increased incidence of disease among captive Bengal tigers in zoos throughout the world
E) the annual migration of birds to a common mating ground in Mexico from geographically distinct locations