In a ring design WAN: a. failure in one circuit means that the network can most likely continue to function
b. failure in one circuit always means that the network will cease to function
c. failure in one computer always means that the network will cease to function
d. failure in one circuit means that there will not be any increased traffic delays in thenetwork
e. failure in one computer always means that messages will stop at that computer sinceit would be impossible to re-route traffic