Which of the following was NOT a result of antebellum technological innovations such as textile machinery, the steam engine, the telegraph, and the use of interchangeable parts?
A. The expanded size and scope of domestic markets
B. The heightened isolation of rural Americans
C. Increased industrial output and worker productivity
D. A revolution in farming and agriculture
Answer: B
Explanation: The technological innovations of the antebellum era led to increased industrial output but did not heighten the isolation of rural Americans. The U.S. remained a primarily agricultural nation, and rural communities did not shrink significantly.