Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
registration : to fully use the vimeo service , you must register as a member by providing a user name , password , and valid email address . 

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