Answer:
I'm pretty sure the answer to this is A.
In English: Relations between the Soviet Union and the United States were driven by a complex interplay of ideological, political, and economic factors, which led to shifts between cautious cooperation and often bitter superpower rivalry over the years.
Cold War, the open yet restricted rivalry that developed after World War II between the United States and the Soviet Union and their respective allies. The Cold War was waged on political, economic, and propaganda fronts and had only limited recourse to weapons.
En Espanol: Las relaciones entre la Unión Soviética y Estados Unidos fueron impulsadas por una compleja interacción de factores ideológicos, políticos y económicos, que llevaron a cambios entre una cooperación cautelosa y una rivalidad entre superpotencias a menudo amarga a lo largo de los años.
Guerra Fría, la rivalidad abierta pero restringida que se desarrolló después de la Segunda Guerra Mundial entre los Estados Unidos y la Unión Soviética y sus respectivos aliados. La Guerra Fría se libró en los frentes político, económico y propagandístico y tuvo un recurso limitado a las armas.
NATO was created to counter Russia's (formally USSR) military power and it has expanded in recent years.
The discovery of the New world set in motion many changes. For example, 50 years after Columbus had arrived in the Caribbean 90% of the native population of the island Hispanola were dead from smallpox. Many diseases came from animals. Cows brought tuberculosis to American continent and from horses and pigs native Indians got influenza. The result was that those diseases drastically reduced populations in America. Answer: <span>America.</span><span />
