Which Factor Most Likely Caused Animals and Plants in India

Multiple Choice

Which factor most likely caused animals and plants in India to differ greatly from species in nearby southeast Asia?

A) The species have become separated by convergent evolution.
B) The climates of the two regions are similar.
C) India is in the process of separating from the rest of Asia.
D) Life in India was wiped out by ancient volcanic eruptions.
E) India was a separate continent until 45 million years ago.