Iron technology was perfected by the

Iron Technology was improved during the Warren States period in China, from 776 BC to 221 BC. This was also a period known as the Iron age, as regional lords in China sought to improve their iron manufacturing techniques in order to elaborate better weapons that will bring them a competitive edge against their pairs.

During this time, meteoric iron was replaced with a new type of iron nicknamed "Pig Iron", which was easier to work with.

the correct answer is d: "party organizers, volunteers, voters, and elected officials."

idk lol i just wanna finish mines