What is one potential negative consequence associated with free trade?

a) Import and export taxes are high under free trade.
b) Buyers and sellers can no longer make price decisions.
c) Countries that practice free trade have high unemployment.
d) People in certain industries earn lower wages or sell fewer products.

d) People in certain industries earn lower wages or sell fewer products.

Please explain why this is the correct answer.

This is the correct answer because free trade can lead to increased competition from foreign producers who can offer products at lower costs. This increased competition can put pressure on domestic industries and result in lower wages for workers or reduced demand for their products. When businesses are unable to compete with cheaper imports, they may have to downsize or shut down, leading to job losses and potentially higher unemployment rates in certain industries.