Abu Dhabi municipality is interested to initiate a national park project. The estimated cost of this project is $3.5 milion and the estimated venues reg to the public equals $515,000 per year. Use the B/C ratio method to calculate what study period (in years) should Abu Dhabi municipality consue beneficial? Assume an MARR of 9% per year. O 11 years O 8 years O 10 years O 9 years