Answer:
I would ask her: One, how large will the business be? Two, how secure she wants/needs the connection to be. And three, how much money she is willing to spend to install and/or maintain her network.
Since Kayla is just starting her business, my recommendation would be to set up her network as a LAN. A LAN is a group of computers and network devices connected together, and most often reside in one building. Kayla's business will start small, so it is not needed to set up her network as a WAN. WAN's are usually not restricted to a geographical location, and can be expanded to cover a whole country, or even a planet. A LAN would make sense in the coverage aspect, since Kayla's business has not expanded yet.
Depending on how secure she wants her network to be, she can choose whether or not she uses WAN or LAN. WAN is less secure, as it covers a large geographical area, while LAN is more secure. LAN is more secure because it covers a smaller area. I would recommend using LAN as it is better to have a secure network as a business.
Finally, Kayla needs to address the cost of setting up and maintaining a LAN or WAN. I would recommend that Kayla uses a LAN because as a starting business, it is important to allocate money properly. LAN's usually cost less to install and maintain due to it's smaller geographical radius, so it would be best to choose to set up her network as a LAN.
Explanation: