Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if you are between the ages of 13 and 17 , you represent that your legal guardian has reviewed and agreed to these terms . 

```
. OPTIONS: ['Arbitration' 'Unilateral change' 'Unilateral termination' 'None'
 'Jurisdiction' 'Contract by using' 'Choice of law' 'Content removal'
 'Limitation of liability'].