Dont quote me on this but i believe the answer is c
A. they became more expensive because they used technology
The technology for America's first textile factory came from B)Britain. It has been stated that the British textile industry was key to the Industrial Revolution in Great Britain before reaching North America and virtually changed most Western societies from agrarian societies into industrial societies, and spread the process of manufacturing, which increased the supply and demand, and essentially production.
The immediate effects are easy. Miles of city would be leveled and all inhabitants of that area would be almost instantly killed. The long-term effects would be there would be so much radiation your body could go through nasty mutation and you'd need to be treated if you survived but if don't survive you'd have a long agonizing death. Also all neighboring cities would have radiation surging through them.