In the united states, which two ideas conflicted with each other during the 1920s and 1930s?

question 5 options:

a. the idea that the u. s. welcomes all who want to be free, and the idea that certain people were undesirable and should be kept out of the country.

b. the idea that children are innocent victims of war, and the idea that wars should never be fought in the u. s. in order to protect young people.

c. the idea that the u. s. was only for white, english-speaking people, and the idea that foreign people would damage the nation.