According to the panama canal treaty signed by president carter, the united states would

The United Stated had exercised control over the region of the Panama Canal since 1903, when the Hay–Bunau-Varilla Treaty granted rights to the United States to build and control the Panama Canal Zone. In 1977, after years of negotiation between the United Stated and Panama, US President Jimmy Carter and Panamanian leader Omar Torrijos signed the Panama Canal Treaty; according to the terms of the treaty, the United States would transfer control of the Panama Canal to the Panamanians by the year 2000.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.