Shengg.com considers purchasing a new equipment which costs $750,000. The equipment is expected to generate positive cash flows over the next 4-year period in the following amounts: Year 1: $350,000 Year 2: $325,000 Year 3: $150,000 Year 4: $180,000 If Shengg.com's required rate of return is 8%. What is this project's payback period? O A. 3.09 years B. 2.50 years OC. 2.91 years OD. 4.00 years