x-16 Find the domain of the function f(x) = x-4 Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choi OA. The domain is {x}. (Simplify your answer. Type an inequality. Use a comma to separate answers as needed.) OB. The domain is {x | x x# }. (Simplify your answer. Use a comma to separate answers as needed.) OC. The domain is {x1x }. (Simplify your answer. Use a comma to separate answers as needed.) OD. The domain is {x | x x}. (Simplify your answer. Use a comma to separate answers as needed.) OE. The domain is the set of all real numbers.