Multi-select problem: How does the next paragraph end?

How to introduce a new dog to visitors
Ask your visitors to call you instead of knocking on the door or ringing the bell.
The sound of an arriving guest might upset the new dog. Therefore, you should ask all potential visitors to call you before they arrive at the house.

Choose your answer from:
(i). Alternately, or in addition, you could put an " out-of-order " sign over your doorbell to prevent its use altogether. Your dog might also be afraid of or agitated by a knock at the door.
(ii). Make guest invitations as public as possible. Make offers to guests up-front.
(iii). If they're unlikely to call by telephone, feel free to do the exact opposite. Gradually introduce your house to the new dog gradually.
(iv). Make sure your dogs do not ingest social corn plants. The only way to introduce your dogs to new visitors is to discourage the cats from visiting the house.
(i).