Answer:
The answer is: A ( It is a bridge)
D. Plains Indians started hunting buffalo more efficiently.
This helped them move more accessibly throughout the land.
He worked on the telescope by improveing it and he studied astronomy
I think the answer should be Normay, France, and Denmark. These countries were occupied by the Germans, but they where not 100% secure. There was the French resistance in France, the Danish resistance in Denmark and the Norwegian resistance in Norway.
Hope this Helps! :)