True or false? immigrants who were not allowed to live collectively so they would assimulate into american culture

What deadly disease cost many workers their lives before dr. william gorgas found a treatment?

Which of the following explains why scarcity is a basic fact of life a. demand will always be greater than supply b. technology has not advanced far enough yet c. there will always be too many people on earth d. people cannot make good allocation decisions

Even though the u.s. was not at war roosevelt met with great britain to sign this secret pact that neither country would seek territorial gains after the war. a atlantic charter c. potsdam charter b. yalta charter d. london charter