The correct answer is D.
A person with a strict interpretation of the constitution wants the government to only perform the powers given to them in the constitution. If the constitution does not explicitly give the power to an individual or group (like the President, Congress, or the Supreme Court) than that group/individual can not perform that duty.
On the other hand, those individuals who think that the constitution is flexible and that some powers can be "assumed" would fall under the category of having a loose interpretation of the constitution.
he believed that states had an unquestionable right to leave the Union.
The Progressives sought to eliminate government corruption in order to empower the urban poor and those who were underprivileged by society. For example, through making the 17th amendment in the constitution which states that the legislators of the United States shall be elected by the people that they represent instead of voting within the Senate, they gave chance for the people to be heard.
D. Czechoslovakia is correct. All others had been concered by Hitler and Nazi Germany.