Final answer:
The assertion about infanticide is false, as such crimes happen across all demographics. Women have historically managed war burdens effectively, proving that statement false. The separate spheres ideology and Cult of Domesticity, which marked true distinctions between middle and working class, is true.
Step-by-step explanation:
The statement that most women who kill their newborn children are young, white, married, educated, and middle class is false. Infanticide can occur across various demographics, and it is not confined to a particular race, marital status, educational level, or economic class.
Regarding the notion that women found themselves incapable of handling war burdens when their husbands and fathers went to fight, this statement is also false. Many women have taken on significant roles during wartime, such as working in factories, serving as nurses, or taking over businesses and farms.
The idea of separate spheres and the Cult of Domesticity in the 19th century did help the American middle class distinguish themselves from the working class as true. This concept held that women should devote themselves to home and family, while men should participate in public life and business, a belief that reinforced class distinctions.