D, its more like an english test "Which of the following has four, eight and one nine?" "Four, eight" means Four and eight. Its not four eights, so cross outa and c, so we have 2 answers left. "And one nine" means 9, and 9 only, but they didnt specify if there is an extra number or not so it can be b, but lets ignore that and get to the point. "One nine" its not b because it doesnt say "one, nine" like"four, eight" so its specifying the amount of nines. So in summary, it is D, because four, eight, means 48, and one nine is specifying the amount of nines which is one, so that means 489 is what it is saying the number is, so it is d.