To prepare to remotely work on a Linux server at work while you are at home, you install VNC Server for Linux by RealVNC $($realvnc$.$com$)$ on the system at work. When you get home, you install the VNC Viewer for Windows on your Windows $10$ laptop. When you try to make the connection, you get an error about a refused connection. Which could be a cause of the error?

a$.$ A VNC solution will not work with Linux. Configure Remote Desktop on the Linux server, and use it with the Remote Desktop client on your home computer.

b$.$ VNC Server for Linux must be configured to tunnel through SSH$.$ Set up the SSH tunnel next time you're in the office.

c$.$ Port $5901$ is not set for port forwarding on the corporate router. Configure the router next time you're in the office.

d$.$ VNC Viewer for Windows will not work with a Linux server. Use Remote Desktop instead.