filtering requires that the filtering rules governing how the firewall decides which packets are allowed and which are denied be developed and installed with the firewall.

Static

Explanation:

A computer or system administrator who want packets to be filter have to set or configured a filtering rules which will enable and allow the firewall to decide on which of the packets that will be allowed to function and the packets that will be denied not to function to be developed and as well installed on the firewall have to make use of what is called STATIC FILTERING reason been that STATIC FILTERING make it of necessary that the filtering rules should be developed and installed with the firewall.

it could be e. idk for sure