In the 16th Century,a Spanish Ship Explored a Pacific Island

Multiple Choice

In the 16th century,a Spanish ship explored a Pacific Island that had a small mountain range separating it.Mice that were on the ship escaped onto the island on both sides of the mountain range.After decades of separation the two populations developed different numbers of chromosomes and in spite of the populations coming together again,the chromosomal differences prevented successful interbreeding.What is true about this speciation event?

A) ecological isolation was followed by mechanical isolation
B) temporal isolation was followed by mechanical isolation
C) ecological isolation was followed by behavioral isolation
D) mechanical isolation was followed by temporal isolation
E) ecological isolation was followed by temporal isolation