Which event proved that the u. s. purchase of alaska had been a good investment

a. alaska quickly became one of the most populous us states.

b. the united states profited from the eventual discovery of gold in alaska.

c. russia suffered a in economic collapse after selling of is access to alaska and resources.

d. great britain offered to buy alaska for more than the united states had pay for the territory.

B

Explanation:

A gold rush began in Alaska in Klondike, which brought fabulous wealth to the United States. Of course Russia must feel regret.

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abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.