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 .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for age restrictions being meaningless ?
Options:
A. Because people do n't pay attention to it .
B. Because they are n't true .
C. Because it 's just a gimmick .
D. Because different kids read at different levels .


D