In the 1840s, the term manifest destiny was used by many americans to justify
(1) the extension of slavery into the territories
(2) war with russia over the oregon territory
(3) the acquisition of colonies in latin america
(4) westward expansion into lands claimed by other nations

(4) westward expansion into lands claimed by other nations.

Explanation:

Manifest Destiny was a doctrine that argued that the United States had a divine right to settle the entire continent of North America. Proponents of this doctrine believed that the United States had been chosen to colonize the whole region because of its unique and advances characteristics, such as its rule of law, its industry, its religious values or its legal system. This idea was used to justify the imperialism that the United States engaged in during the 19th century.

30 and 44 are b

explanation:

- "it was a failure that was an embarrassment for the kennedy administration."

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