Which statement best describes an important but unintended consequence of the construction of the Panama Canal? Panama became a powerful trading country.
Medical science advanced in fighting tropical disease.
O
Canal locks were continually troubled by mechanical failures.
o
Panama became a temporary United States territory after construction.

i think the answer is the one about environmental and social health.

hope this

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.