Which of the following is an example of thinking at the margin?

Where are the examples?

Figuring out what you will give up and/or gain by hiring a new worker...this is the answer I picked and it worked but im not sure if you have the same test that I did sorry I cant be of more help

Ifound this on google “simply, the working conditions were terrible during the industrial revolution. as factories were being built, businesses were in need of workers. with a long line of people willing to work, employers could set wages as low as they wanted because people were willing to do work as long as they got paid.” i hope this you for what your looking for.