The statement that is proven true with an investigation of NAFTA is: "NAFTA resulted in job losses for some Americans but also lower prices on goods sold in the U.S."
This response reflects the economic impact of NAFTA, which included job losses in certain sectors, particularly manufacturing, but also benefits such as lower consumer prices due to increased trade and competition. The other statements either misrepresent the facts of NAFTA or are incorrect regarding the nature of USMCA.