what do the arrows that are shown within the Access Rul…

When you are using Oracle Compute Service Console and reviewing the network
configuration of your database instance, what do the arrows that are shown within the
Access Rules define?

A.
They are used to show if the connection was completely secured.

B.
They define the availability of network access to the database instance.

C.
They define the direction of network access to the database instance.

D.
They show the status of the database instance.

Explanation:
The arrows indicate if the access rule is enabled or not.
Example:

https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/serviceconsole-access-rules-page.html