Back of the house employees do not serve guests directly, so the statement is False. Proprietors in a proprietary colony had multiple responsibilities, so that statement is also False. The notion of separate spheres and the Cult of Domesticity did help the American middle class distinguish themselves as superior to the working class, making that statement True.
Back of the house employees typically work behind the scenes in a restaurant or hospitality setting and are not responsible for serving guests directly, which is a task typically performed by front of the house staff. Therefore, the statement is False.
In a proprietary colony, the Proprietors had several responsibilities beyond just collecting profits. They were responsible for managing the colony's affairs, including creating laws, appointing officials, and defending the colony. The statement is False.
The notion of separate spheres and the Cult of Domesticity did play a role in how the American middle class distinguished themselves from the working class during the 19th century by emphasizing different roles for men and women, with women's roles centered around the home and moral purity. This notion suggests a class distinction based on social and moral values, making the statement True.