When negative externalities are present in a market

A. choices private costs are greater than social costs
B. social costs are greater than private costs
C. social value is greater than private value
D. private value is greater than social value

Evans used his credit card to run up a $98.75 bill with the rosen department store. when rosen tried to collect, evans wrote a check for $79.00. he wrote on the check that he meant it to be “full payment of all accounts to date.” rosen cashed the check. when rosen sued evans for the $19.75 balance, evans argued that under accord and satisfaction, the fact that rosen cashed the $79.00 check meant that it had accepted that amount as full payment. was evans correct? can anyone me out with this question?