Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
parents and guardians who wish to review personal data concerning their child ( ren ) will be required to specify the usernames and passwords of the child ( ren ) concerned , and to provide their own e-mail address for verification and contact purposes . 

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