A 2,500 square foot house in New Jersey costs $1,800 each winter to heat with its existing oil-burning furnace. For an investment of $4,500, a natural gas furnace can be installed, and the winter heating bill is estimated to be $1,200. If the homeowner's MARR is 6% per year, what is the discounted payback period of this proposed investment? Choose the correct answer below 0 A. The discounted payback period of this proposed investment is 11 years O B. The discounted payback period of this proposed investment is 8 years C. The discounted payback period of this proposed investment is 10 years. O D. The discounted payback period of this proposed investment is 9 years