What Was HSPD-4, the National Strategy to Combat Weapons of Mass

What was HSPD-4, the National Strategy to Combat Weapons of Mass Destruction (WMD) ?

A) It responded to concerns following the Oklahoma City bombing and the sarin gas attacks about the poor state of capabilities in the U.S to deal with WMD attacks, especially at the state level.
B) It attempted to deal with all aspects of WMD threats, but it did have a focus on changing our approach to biological threats, which had traditionally been similar to our approach to dealing with chemical threats.
C) It was designed to prevent terrorist attacks within the United States, reduce the vulnerability of the United States to terrorism, and minimize the damage, and assist in the recovery, from terrorist attacks that do occur within the United States.
D) Previously, the DHS was authorized to regulate chemical facility security. This was issued to implement that authorization.