In the case of hammer v. breidenbach, 31 mo. 49 (1860), mr. breidenbach was hired to brew beer in a cave for his employer, at a salary of $1,000 per year. the contract between the bavarian brewery (which would later become anheuser-busch) and mr. breidenbach specified that any violation of the agreement would result in the breaching party paying the sum of $500 to the injured party. because the cave was dangerous, mr. breidenbach refused to enter it to make the beer, and his employer demanded the $500. an appellate court later determined that mr. breidenbach should not be required to enter the cave and endanger himself, and he was not required to pay the $500 "penalty." in which of the following modern cases could this case act as an appropriate precedent?
a. a case where an employee was terminated for not attending work in a "sick" mold-infested building.
b. a case where a caterer refuses to enter a condemned building to provide food to a halloween party.
c. a case where a liquidated (pre-determined) damages payment in a contract was excessively disproportionate to the injury.
d. a case where an employer was sued for forcing employees to work in unsafe conditions.