Zaida quits her job as an accountant where she earns $60,000 per year to go back to school for two years to get an MBA degree. She attends a school that charges $25,000 per year for tuition and related expenses. How much is the total cost (explicit cost plus opportunity cost) of that degree?

A. $143,436

B. $170,000

C. $158,436

D. $46,718