Why did the United States invest billions of dollars into nuclear research in the mid-twentieth century? A
to enable US colonial expansion into territories in the Pacific
B
to facilitate economic growth through government spending
С
to develop atomic weapons before the Axis powers
D
to reduce US dependence on petroleum imports

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

im not sure its either a leader of a group of congresspeople or a person from a congressmans district

sorry im not sure

continental currency was denominated in dollars from $​1⁄6 to $80, including many odd denominations in between.