What are the answers to the three basic economic questios?

Which was not a country that massively built up its navy in the early 1900s? germany china united statesbritain

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.

What information is usually stamped on the side of a rifle's barrel?