Refer to the exhibit. Router R1 Fa0/0 cannot ping router R3 Fa0/1. Which action must be taken in router R1 to help resolve the configuration issue?


A. set the default gateway as 20.20.20.2
B. configure a static route with Fa0/1 as the egress interface to reach the 20.20.2.0/24 network
C. configure a static route with 10.10.10.2 as the next hop to reach the 20.20.20.0/24 network
D. set the default network as 20.20.20.0/24