X Corporation has been presented with an investment opportunity which will yield cash flows of $30,000 per year in Years 1 through 4, $35,000 per year in Years 5 through 9, and $40,000 in Year 10. This investment will cost the firm $150,000 today, and the firms required rate of return is 10 percent. Assume cash flows occur evenly during the year. What is the payback period for this investment?

A) 4.35 yrs

B) 5.23 yrs

C) 4.86 yrs

D) 6.12 yrs

E) 4.0 yrs