What is the domain of Ax) = 4*? O A. All nonnegative real numbers
O B. All real numbers greater than 4
O C. All real numbers
O D. All real numbers greater than or equal to 4

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.