What Is True Regarding a Default Route

Multiple Choice

What is true regarding a default route?

A) The default route is always used first.  When the default route is not available more specific routes are tried.
B) When a default route is set, all other routes are disabled until the default route is deleted.
C) The default route is only used if there is not a more specific route to a destination host or network.
D) Without a default route, no network communication even in directly attached networks is possible.