Answer: I would contend that the right answer is the A) Keeping the nation safe.
Explanation: Both the opening and the closing lines of this excerpt refer to the outgoing effort that the government of the United States was doing in order to keep the nation safe from Al-Qaeda - "our mission continues" and "unprecedented measures to defend the homeland and we will continue to hunt down [...]." Likewise, throughout the text there are references to the danger that the terrorist organization was still posing ("they continue to plot against free people," "proliferation of deadly weapons," and "the enemies of freedom as not idle"), as if to stress that the role of the US government in defending its territory was crucial. In this part of his speech President George W. Bush was not talking about supporting the government, starting terrorist organizations or specifically improving the use of technology.
