The correct answer is: "the end of American neutrality in World War II"
The Lend-Lease Act was a program enacted in the US in 1941 to provide support to Allied countries so that they could defeat the axis forces (nazi Germany, fascist Italy and the Japanese Empire) in WWII, but the US had not decided to directly participate in the conflict yet.
The program consisted on the distribution of food, oil, and all types of military materials and it remained functioning since 1941 until the end of the conflict in 1945.
Dorothea Dix help expaned and founded more than 30 hospitals within a period of 15 years. She did this and educated people about mental illnesses and the possibility if recovery for most patients.
Option D. It banned slavery in the Indian Territory was not the feature of Chickasaw's constitution.
The Constitution clearly says " The legislature has no power to pass laws for the emancipation of slaves without the consent of their owners, nor without paying their owners previous to such emancipation a full equivalent in money for the slave so emancipated".
Democracy, The United States, under its Constitution, is a federal, represent- ative, democratic republic, an indivisible union of 50 sovereign States.
Limiting factor can be birth rate or death rate