Which change should be made to the static route command so that traffic will only use the OSPF link when it is up?

The Branch Router has an OSPF neighbor relationship with the HQ router over the 198.51.0.4/30 network. The 198.51.0.8/30 network link should serve as a backup when the OSPF link goes down. The floating static route command IP route 0.0.0.0 0.0.0.0 S0/1/1 100 was issued on Branch and now traffic is using the backup link even when the OSPF link is up and functioning. 
1. Add the next-hop neighbor address of 198.51.0.8.

2. Change the administrative distance to 1.

3. Change the destination network to 198.51.0.5.

4. Change the administrative distance to 120.