By ensuring that all content flows through a single point, proxies provide a checkpoint for network data, which is an advantage rather than a liability, as are other choices.
Source: STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000,
Chapter 8: Application-Level Proxies.

Wire and cash transfers of $10,000 or more in a single transaction
must be reported to government officials.
Actions in answers "Subpoena of electronic records", "Monitoring of Internet communications", and c are permitted under the Patriot Act.
In answers "Subpoena of electronic records" and "Monitoring of Internet communications", the government has new powers to subpoena electronic records and to monitor Internet traffic. In monitoring information, the government can require the assistance of ISPs and network operators. This monitoring can even extend into individual organizations. In the Patriot Act, Congress permits investigators to gather information about electronic mail without having to show probable cause that the person to be monitored had committed a crime or was intending to commit a crime. In
answer c, the items cited now fall under existing search and seizure
laws. A new twist is delayed notification of a search warrant. Under
the Patriot Act, if it suspected that notification of a search warrant
would cause a suspect to flee, a search can be conducted before notification of a search warrant is given.
In a related matter, the US and numerous other nations have
signed the Council of Europes Cybercrime Convention. In the
US, participation in the Convention has to be ratified by the Senate.
In essence, the Convention requires the signatory nations to spy on
their own residents, even if the action being monitored is illegal in
the country in which the monitoring is taking place.

Reference:
https://owasp.org/www-project-web-security-testing-guide/assets/archive/OWASP_Testing_Guide_v4.pdf (15)

Explanation/Reference:
Explanation:
Backward chaining (or backward reasoning) is an inference method that can be described as working backward from the goal/hypothesis. It is used in automated theorem provers, inference engines, proof assistants and other artificial intelligence applications.
Incorrect Answers:
A: A blackboard system is an artificial intelligence application based on the blackboard architectural model, where a common knowledge base, the "blackboard", is iteratively updated by a diverse group of specialist knowledge sources, starting with a problem specification and ending with a solution.
B: Lateral chaining is not one of the expert system operating modes.
C: Forward chaining is the opposite of backward chaining. Forward chaining starts with the available data and uses inference rules to extract more data until a goal (hypothesis) is reached.
References:
https://en.wikipedia.org/wiki/Backward_chaining

The correct answer is Volatile. RAM is volatile. The other answers are incorrect because RAM is volatile, randomly accessible, and not programmed by fusible links.