How is The Battle of Gettysburg the turning point of the Civil War? What makes it more of a Turning point than the battles of Vicksburg, Shiloh, and Antietam? (APUSH)

Which scenario is least likely to occur in a market economy? a) the government pays farmers to stop planting certain crops for a period of time. b) the government stops a factory from producing imitations of an expensive type of purse. c) the government offers tax breaks to companies that meet efficiency goals in their products. d) the government allows only two competitors to offer goods for sale on the country's highways.