A skyscraper is 807 feet tall. Each floor is about 12 feet tall. About how many floors de building have? Select the correct answer below and fill in the answer box to complete your choice. OA. You need an estimate: 800-10 = floors OB. You need an exact answer, 807 - 12 = floors C. You need an estimate: 1000-20 = floors OD. You need an estimate: 500- 25 = floors.