Tick a box on a form and you have apparently achieved something . But the statement " this book is for a x year old " is meaningless . The only meaningful statement is " this book is for whoever has the maturity to read it . " Oh dear .

Based on the preceding passage, choose your answer for question What may be the reason for age restrictions being meaningless ?

(1). Because people do n't pay attention to it .;
(2). Because they are n't true .;
(3). Because it 's just a gimmick .;
(4). Because different kids read at different levels .;
The answer is:
(4).