PLEASE HELP! Please put an actual answer

Which of these situations shows someone who is considering opportunity costs?

A. Sam volunteers in a hospital and later joins his friends in a game of football.

B. Martha buys all the groceries she needs for the month.

C. Amanda decides to use her free time to exercise instead of sleep.

D. Clara goes shopping at a mall and buys two pairs of shoes.

Why have the aztec ruins in mexico city not been dug up?

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?

What obstacles did jen bricker face early in life?