If a metric is not specified for routes that are redistributed into OSPF, the default metric that
is assigned to the routes is 20, except for redistributed BGP routes. What is the metric that is
assigned to redistributed BGP routes?

A.
200

B.
0

C.
1

D.
10

Explanation:
If a metric is not specified, OSPF puts a default value of 20 when redistributing routes from
all protocols except Border Gateway Protocol (BGP) routes, which get a metric of 1.

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009487e.shtml#o
spf