the appearance of volcanoes at the boundaries where plates collide earthquakes at boundaries where one plate slides past another cases where a species exists in only one isolated place fossils of the same species found on widely separated continents
I gave my students this multiple choice question: Which is the best evidence for the theory of continental drift?

Only one answer is correct among these 4 choices:
- the appearance of volcanoes at the boundaries where plates collide
- earthquakes at boundaries where one plate slides past another
- cases where a species exists in only one isolated place
- fossils of the same species found on widely separated continents

Could you tell me which one is correct?

fossils of the same species found on widely separated continents