C. first battle in which American Indians fought outside of the Indian Territory
He studied the fossils' age and how tall the mountains are. He also studied how old they are. I don't know about Coal Beds but he also used balloons to find out the continents were once a big supercontinent called Pangaea and they apparantly drifted apart
One of the biggest reasons that Germany surrendered is because they were running out of supplies and they were economically poor. They didn't have enough money to get more equipment. Not only did they have insufficient funds, but they were also stabbed in the back on the home front in 1916 when Ludendorf initiated war socialism.
Hope this helped!
B is your answer to the question
