Which factor was most important to the United States’ purchase of Alaska? A. national defense
B. political concerns
C. natural resources
D. growing population

C and D

Explanation:

Alaska back then was rich in natural resources such as minerals, timber and oils.

Also, the Alaskan territory was quite big. The Treaty used to purchase Alaska enlarged the United States by 586,000 square miles, an area more than twice the size of Texas, all for the bargain price of around two cents an acre.

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.