Context: 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 .

Question: What may be the reason for age restrictions being meaningless ?
Options:
0. Because people do n't pay attention to it .
1. Because they are n't true .
2. Because it 's just a gimmick .
3. Because different kids read at different levels .
Answer: 3