Final answer:
The statement that the separate spheres ideology and the Cult of Domesticity established social distinctions and a sense of superiority for the middle class over the working class in 19th-century America is true.
Step-by-step explanation:
The notion of separate spheres and the Cult of Domesticity did indeed contribute to a class distinction in 19th-century American society. The concept suggested that men were best suited to the public sphere involved in business, politics, and economics - while women were to rule the domestic sphere, which included managing a household and rearing children. This ideology served to reinforce social norms that benefitted the middle class, as those with the financial resources could afford to maintain such distinct roles, therefore, setting themselves apart from and often claiming to be superior to the working class, who couldn't afford these separations as easily. Thus, the statement that the notion of separate spheres and the Cult of Domesticity allowed the American middle class to distinguish themselves as separate from and superior to the working class is true.