Regarding the description of OSPF external route types, which is wrong?

Regarding the description of OSPF external route types, which is wrong?
A . OSPF is divided into the first type of external routes and the second type of external routes.
B . The cost of the first external route of OSPF is the sum of the internal cost of AS (the router-to-ASBR overhead) and the AS external cost.
C . The cost of the second type of OSPF external route is AS external cost.
D . With the same other conditions, the first type of external route of OSPF is always preferred over the second type of external route.

Answer: D