Strong evidence that two continents were once joined might include som
the current location of rivers empting into the ocean.

a) the current location of rivers emptying into the ocean.
b) similar coastal rock formations.
c)similar plants growing on the continents today.
d) the locations of earthquakes and volcanoes.

C) Similar plants growing on the continents today.

Explanation:

Continental drift is an important phenomenon which refers to the horizontal movements of continents. According to the German meteorologist Wegener, there was a single continent called Pangea. According to his hypothesis there were two primordial continents: "Laurasia" in the north and "Gondwana" in the south. His theory explains how the continents moved apart. This same man gave theories to about the fossils and rock formations of the drifted continents that were once together.