What is a static route's administrative distance on a Cisco router, and what happens when both a static route and an OSPF route exist for the same prefix?

• A.A static route has AD 0 on Cisco IOS; OSPF has AD 110; both routes are installed and traffic load-balances between them
• B.A static route has an administrative distance (AD) of 1 on Cisco IOS; OSPF routes have an AD of 110. Since lower AD is preferred, the static route wins and is installed in the routing table, with the OSPF route kept as a backup
• C.OSPF routes always override static routes regardless of AD; static routes are only used when no dynamic protocol runs, as traceroute works by incrementing the destination port until the target answers with SYN-ACK on the first probe
• D.Static routes have AD 255 (unreachable); they are only used as last resort when all dynamic routes fail; policy-based routing matches only on destination address, like ordinary routing. BGP converges faster than any interior gateway protocol because it floods link states hourly