President barak obama issued two documents related to critical infrastructure that increase the national focus on issues of security and resilience. these two

documents are:

select one or more:

a. presidential policy directive-21: critical infrastructure security and resilience.

b. presidential policy directive-2: implementation of the national strategy for countering biological threats.

c. executive order 13636: improving critical infrastructure cybersecurity.

o d. executive order 13616: accelerating broadband infrastructure deployment.

The correct answer is A) Presidential Policy Directive-21: Critical Infrastructure Security and Resilience.

And C) Executive Order 13636: Improving Critical Infrastructure Cybersecurity.

Explanation:

Both these, the Presidential Policy and the Executive order were issued on the 12th of February 2013 in order to great a stronger security policy for both online and offline infrastructure of the country.

During President Obama's tenure, it was evident that many countries had been able to hack into the government's databases. What were first seen as one off events became increasingly common. In the modern world cyber security is interlinked with everything else and there was a need to strengthen the United States's infrastructure security from foreign intervention.