Answer:
Neptune
Explanation:
Has the longest obrital time from any of the other planets in the solar system
It is c. The underwater mountain chain wasn't discovered until after we he died. The right answer is c because he noticed since all the fossils
line up they must have once been one continent and the continental drift is the theory that the plates spread apart
You can visit Paektu Mountain, Mansudae Hill Grand Monument and lot more.
If you are doing this for edgen.uity the answer is all the above