Both the soviet union and the united states began investing more heavily in space exploration during the cold war. in 1969, the spacecraft apollo 11 landed on the moon, and two american astronauts took the first footsteps on the lunar surface this is an example of which theme in american history?

a. competition with other nations.

hello!

according to the passage the most suitable options are two. the first one is "by leading the aef to victory in several key battles" like the battle of saint- mihiel and the battle of cantigny mentioned in the passage you copied here. the second one is "by the aef and allied forces defeat germany" since the passage says that his army destroy the german resistance in the meuse- argonne offensive. and also, "by insisting that the aef operate as an independent force".

hope this