Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
if we delay exercising or fail to exercise or enforce any right available to us under these terms , such delay or failure does not constitute a waiver of that right or any other rights under these terms . 

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