Charlotte has set up a home maintenance service that operates out of her city. Workers commit to being available for certain hours during the week. Charlotte takes calls and schedules workers according to their skills and availability. Work assignments are made on the company's database. Workers check their work assignments from their home offices located throughout the city. After completing each job, workers update the database. The network Charlotte's business uses is most likely a _____.

A: LAN
B: MAN
C: WAN