Which of the following is a low-tech way of gaining unauthorized access to systems?

A.
Social Engineering

B.
Sniffing

C.
Eavesdropping

D.
Scanning

Explanation:
Social engineering, in the context of information security, refers to psychological manipulation of people into
performing actions or divulging confidential information. A type of confidence trick for the purpose of information
gathering, fraud, or system access.
https://en.wikipedia.org/wiki/Social_engineering_(security)