You have just configured a static default route on router TK1. What is the purpose of a default route?（）

• A、It is a route to be used when the routing protocol fails.
• B、It is a route configured by an ISP that sends traffic into a corporate network.
• C、It is a route used when a packet is destined for a remote network that is not listed in the routing table.
• D、It is a route manually configured for a specific remote network for which a routing protocol is not configured.
• E、It is used to send traffic to a stub network.