Final answer:
The best inference about the concerns of Americans in 1787 that is supported by the title of the excerpt 'Federalist No 10. The Same Subject Continued - The Union as a Safeguard Against Domestic Faction and Insurrection' is that Americans are adamant that factions be dissolved.
Step-by-step explanation:
The best inference about the concerns of Americans in 1787 that is supported by the title of the excerpt 'Federalist No 10. The Same Subject Continued - The Union as a Safeguard Against Domestic Faction and Insurrection' is option D. Americans are adamant that factions be dissolved.
In this excerpt, James Madison specifically addresses the issue of domestic faction and insurrection. He argues that the Union, which refers to the United States government, is necessary to prevent the dangers and divisive influences of factions. Therefore, it can be inferred that Americans in 1787 were concerned about the negative impact of factions and desired their dissolution.