12. what are you doing when you make a decision at the margin?
o examining two primary options and their trade-offs before making a decision
o taking an all or nothing approach to a problem
o refusing to make a choice
reviewing several options of how to use one
dditional unit of a resource

Karin bought illegal firearms at a gun show. at her trial, she alleged that she had committed this crime because her boyfriend had threatened to harm her and her two daughters if she did not. her lawyer asked the judge to instruct the jury that the prosecution had an obligation to prove beyond a reasonable doubt that karin had acted freely. instead, the judge told the jury that karin had the burden of proving duress by a preponderance of the evidence. who is correct?