1. Ruby is considering a college degree. She learned that the total costs (including the tuition, fees, and forgone wages) of a college degree is $120,000. Her annual income with a college degree will be $14,000 higher than a high school graduate. She is planning to work for 15 years after graduation. How does her ROI on college change if she decides to work for 30 years instead of 15 years?

a. His ROI will decrease by 3.35%

b. His ROI will increase by 8.53%

c. His ROI will increase by 3.35%

d. His ROI will decrease by 8.53%