Questions: Which of the following about the nature of the economy by the early-to mid-nineteenth century in America is best supported by the details in Grimke's argument? The household and farm as a center of economic production remained important. People saw greater opportunities for social mobility. Land ownership was still the only source of building wealth. More and more, incomes were earned outside of the home.

The answer is "More and more, incomes were earned outside of the home."

While the household and farm were indeed significant centers of economic production in early American history, by the early-to mid-nineteenth century, the economy was undergoing significant changes. The Industrial Revolution was beginning to take hold, leading to a shift in economic activities.

This statement is true to some extent, as the Industrial Revolution and westward expansion did provide new opportunities for social mobility. However, this option does not directly address the nature of economic production as discussed in Grimke's argument.

By the early-to mid-nineteenth century, land ownership was no longer the only source of building wealth. The rise of industrialization and urbanization provided new avenues for economic advancement, such as factory work and entrepreneurship.

This option is best supported by the details in Grimke's argument. The early-to mid-nineteenth century saw a significant shift in the American economy, with more people earning incomes outside of the home due to the growth of factories, businesses, and other forms of employment that were part of the Industrial Revolution. This shift marked a move away from the traditional agrarian economy towards a more industrial and market-oriented economy.