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?

Setting a default gateway is for devices or stub routers to reach any unknown network, not typically for a specific remote network when other routes might exist.

Configuring a static route with an egress interface only is valid, but the target network 20.20.2.0/24 differs from the 20.20.20.0/24 network implied by the correct answer.

For Router R1 to reach the remote network 20.20.20.0/24 where R3 Fa0/1 resides, a static route must be configured. This route should specify 10.10.10.2 as the next-hop IP address, which is presumably the IP address of an adjacent router directly reachable from R1.

The `default network` command is an outdated method for establishing a default route for classful networks and is not the preferred or most precise way to route to a specific remote subnet.