Which two pieces of data would support the idea that pangaea once existed? A. Fossils of one plant species found all over one continent.

B. Similar mountain formations in north america and europe.

C. Animal fossils of one species found on four countries.

D. Markings from glaciers found in places currently​

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks