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