When looking at the routing table of a linux system, you see the Destination is $0\mathrm{.}0\mathrm{.}0\mathrm{.}0$ and the Genmask is also $0\mathrm{.}0\mathrm{.}0\mathrm{.}0.$ What would this mean why would it be useful?

a$.$ This would mean it will only follow this route rule when the destination is on the local subnet of the system. This would be useful for routing traffic to the internet.

b$.$ This would mean it will only follow this route rule when the destination is from any ip address. This would be useful for routing traffic to the default gateway.

c$.$ This would mean it will only follow this route rule when the destination is on the local subnet of the system. This would be useful for routing traffic to the default gateway.

d$.$ This would mean it will only follow this route rule when the destination is from any ip address. This would be useful for routing traffic to the local subnet of the system.