Russia offered to sell Alaska in 1859 because they were in debt from the Crimean War. The U.S. did not initially make this purchase because of Civil War debts.
At the time of the purchase, America was still in a expansive mood. No one knew of any resources in Alaska then. Oil was not a big one for anyone. Alaska was even called "Stewart's Folly" (Stewart was a secretary of the interior) and a waste of federal money. (The dang place went for about 10 cents per square mile!)
Stewart wanted to simplify the map of North America and to block the British in Canada from further expansion as the USA and the British Empire were still not the best of friends.
Also, the Russians felt they could never have a firm hold on such a distance colony, needed some cash in a hurry because of a pending war with the Ottoman Empire and the Tzar on the throne at the time was a bit wacky.
It was strictly a move by the USA to secure the last major piece of real estate still open in North America.
I hope this helps:)
Answer:
he hoped to prevent futurewars
One recommendation that I can give is that the right should be well knows. So, for example, there could be an information sign in the community informing people of their rights (such as: the right not to experience violence, including sexual and physical violence from anyone and also from family members).
The research error described above is an example of selection bias.
Selection bias takes place when, from a population of interest, a group of individuals is selected in order to construct a sample but without a proper randomization. The result is a sample which is not representative of the underlying population.
According to the example, the target population of the research comprises all students but the sample only includes boys. Hence, selection has not been random because it followed a gender criteria, and the results obtained using it cannot be applicable to the whole population because they are affected by a selection bias.