Click the Exhibit.

You are using OSPF as your IGP in your network. You have applied the OSPF configuration shown in the exhibit to router R1.
Which statement is true in this scenario?

A.
Router R1 must be configured as a stub area for Area 0.0.0.0.

B.
Router R1 will send a default route to router R2.

C.
Router R2 will not have a route to subnet 172.16.4.0/24.

D.
Router R3 will not have a route to subnet 172.16.3.0/24.