Which option describes the reason for this behavior?

Refer to the exhibit.

R3 prefers the path through R1 to reach host 10.1.1.1.
Which option describes the reason for this behavior?

A.
The OSPF reference bandwidth is too small to account for the higher speed links through R2.

B.
The default OSPF cost through R1 is less than the cost through R2.

C.
The default OSPF cost through R1 is more than the cost through R2.

D.
The link between R2 and R1 is congested.