Konner is purchasing new equipment for a network installation at an organization. A combination of Controller access points $($APs$)$ and a wireless LAN controller $($WLC$)$ is being considered. What is one of the disadvantages of this option? a$.$ A WLC provides true convergence between wired and wireless. b$.$ They use a web browser to allow the user to enter credentials. c$.$ A WLC allows for centralized management. d$.$ APs and the WLC must be purchased from the same vendor.