Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you are solely responsible for all activities conducted through your account whether or not you authorize the activity ( except to the extent that activities occur because someone gains access to our system without using your identifiers and password ) . 

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