Monmouth Publishing Employs Very Brilliant Attorneys to Search Through the Laws

Monmouth Publishing employs very brilliant attorneys to search through the laws to find legal loopholes that benefit their profit margin. They find a legal loophole which allows them to require a certain sect of employees to work far under minimum wage, often times taking advantage of people. Therefore, they decide to fire all of their current employees in favor of the sect of employees that they can pay under minimum wage. Are they acting unethically?

A) No. As long as they are not breaking the law it is always ethical.
B) Yes. Firing employees for any other reason other than poor working ethic is always unethical.
C) No. The law does not matter when businesses must choose what is ethical as making money is only considered.
D) A particular act can be deemed unethical yet still be legal.