Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
in order to make the arbitration most convenient to you , airbnb agrees that any required arbitration hearing may be conducted , at your option , ( a ) in the county where you reside ; ( b ) in san francisco county ; ( c ) in any other location to which you and airbnb both agree ; ( d ) via phone or video conference ; or ( e ) for any claim or counterclaim under $ 25,000 , by solely the submission of documents to the arbitrator . 

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