in order to make the arbitration most convenient to you , airbnb agrees that any required arbitration hearing may be conducted , at your option , -lrb- a -rrb- in the county where you reside ; -lrb- b -rrb- in san francisco county ; -lrb- c -rrb- in any other location to which you and airbnb both agree ; -lrb- d -rrb- via phone or video conference ; or -lrb- e -rrb- for any claim or counterclaim under $ 25,000 , by solely the submission of documents to the arbitrator .