Classify the statements based on whether they show bias or reliability

What from the columbian exchange had perhaps the biggest impact on the world?

56: 58 the assembly line was a system through which items were mass-produced in a flow.

Part a: which statement identifies the central idea of the text? a: the north was more powerful than the south and was always going to be the victor of the civil war. b: despite the obvious strength of the north, the outcome of the war was unpredictable at the time. c: the united states underestimated the strength of the south, giving it the upper hand. answer !