Answer:
The right option is Ores must be processed
Explanation:
Ores are the rocks that contain minerals like iron, gold, or any other valuable minerals. These ores are extracted from earth by the process called mining. When these ores are extracted, they have different other impurities with them, Then they are processed by smelting to extract the valuable element out of it. Since Carlos wrote that ores do not need to be processed is his mistake.
