Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
modify or cause to be modified any files that are a part of the service or any supercell game without supercell 's express written consent . 

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