Refer to the exhibit. An engineer is trying to redistribute OSPF to BGP, but not all of the routes are redistributed. What is the reason for this issue? 

Answer options:

A. By default, only internal routes and external type 1 routes are redistributed into BGP
B. Only classful networks are redistributed from OSPF to BGP
C. BGP convergence is slow, so the route will eventually be present in the BGP table
D. By default, only internal OSPF routes are redistributed into BGP

D