Final answer:
American farmers and seaport cities were the areas most upset by the Embargo Act.
Step-by-step explanation:
The two areas that were most upset by the Embargo Act were American farmers and seaport cities. American farmers were greatly impacted because they could no longer sell their goods overseas, leading to economic hardship. Seaport cities experienced a significant increase in unemployment and bankruptcies as the embargo caused a decline in American business activity.