Refer to the exhibit. 
What is the simplest way to configure routing between the regional office network 10.89.0.0/20
and the corporate network?
A.
router1(config)#ip route 10.89.0.0 255.255.240.0 10.89.16.2
B.
router2(config)#ip route 10.89.3.0 255.255.0.0 10.89.16.2
C.
router1(config)#ip route 10.89.0.0 255.255.240.0 10.89.16.1
D.
router2(config)#ip route 0.0.0.0 0.0.0.0 10.89.16.1
Explanation: