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