A builder uses one hour each day to travel between home and work. He works 40 hours per week for $\$200$. He is offered the option of working 50 hours a week for an additional $\$75$. What is the opportunity cost to the builder of taking the extra hours?
- Athe ability to increase his purchasing power
- Bthe additional time travelling to and from work
- Cthe increased hourly earnings of $\$7.50$
- Dthe ten hours of leisure time