Consider two hypothetical workers. Worker 1 was employed for many years as an electrician in a pulp and paper mill and has recently been diagnosed with mesothelioma. Worker 2 was employed for many years as a night-shift nurse and has recently been diagnosed with breast cancer. Both workers believe that their diagnosis is the result of their work. Which of these workers would have an easier time, and which worker would have a more difficult time, “proving” that their diagnosis was caused by their work? Why?