General Motors has a weighted average cost of capital of 7%. GM is considering investing in a new plant that will save the company $30 million over each of the first two years, and then $20 million each year thereafter, continuing indefinitely. If the investment is $150 million, what is the net present value (NPV) of the project? O A $107.7 million B. $123.0 million C. $153.8 million OD $138.4 million