The Iron Age, also known as being part of the late Bronze Age, began in approximately 1200 BCE in areas of Central Asia. Before this time, tools were made from bronze rather than iron, though many knew that iron was a stronger metal. Which of the following best explains the event that caused people to start making tools out of iron? A. Higher temperature smelting techniques were developed. B. People realized iron ore mixed with coal made a stronger metal. C. Better mining techniques were developed and made it easier to find iron. D. Bronze resources were becoming increasingly scarce in areas of Asia.