An example of a rapid change in conditions on Earth is a. continents moving. c. organisms adapting. b. tectonic plates shifting. d. a meteor striking Earth.

d. a metoer striking Earth

Explanation:

Every other change happens over a long period of time. Continents move slowly and adaptations take many years. A meteor, though, strikes the Earth and devates that environment.

no one really purchased it themselves, it was all america, they had debates etc.

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.