A 1,500 square foot house in New Jersey costs $1,725 each winter to heat with its existing oil-burning furnace. For an investment of $5,500, a natural gas furnace can be installed, and the winter heating bill is estimated to be $1,000. If the homeowner's MARR is 6% per year, what is the discounted payback period of this proposed investment? Choose the correct answer below. O A. The discounted payback period of this proposed investment is 8 years. B. The discounted payback period of this proposed investment is 9 years. O C. The discounted payback period of this proposed investment is 11 years. OD. The discounted payback period of this proposed investment is 10 years