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You've created a new firewall rule to allow incoming traffic on port 22, using a target tag of 'dev-ssh'. Despite this, you're unable to connect to one of your instances. What steps should you take to resolve this issue?
A
Reboot the instances for the firewall rule to take effect.
B
Use source tags in place of the target tags.
C
Run the gcloud firewall-rules refresh command, as they need to be reloaded.
D
Apply a network tag of 'dev-ssh' to the instance you're trying to connect into and test again.
