Write the next sentence in this paragraph:

How to find a good plumber
Check to make sure that they have a plumbing license.
The most basic rule is to be sure that they're licensed and carry full insurance that protects you and your neighbour's property in the event of a catastrophe.
Get two or more references and read online reviews.

Choose your answer from: [i] You can even ask to see some of the work they have done. Read their facebook page and twitter feed to see how they are interacting with their customers Ask how long they have been in business for.. [ii] Call up and ask to be interviewed. Be sure that the plumber says that they have good references; if they don't, then you'll need to look elsewhere.. [iii] A good plumber will not go out of business without at least two references from his existing clients. Help the plumber if they need to fix breaks, as a tenant hasn't been fighting disputes or doing his job properly.. [iv] If they're having trouble writing their claims, ask them what other complaints they get from the landlord or any home owners in the area. Confirm that the plumber is licensed and has experience in plumbing problems..
[i]