Which of the following is the MOST plausible method of social engineering to be conducted during this engagement?

A penetration tester has been contracted to conduct a physical assessment of a site.

Which of the following is the MOST plausible method of social engineering to be conducted during this engagement?
A . Randomly calling customer employees and posing as a help desk technician requiring user password to resolve issues
B . Posing as a copier service technician and indicating the equipment had “phoned home” to alert the technician for a service call
C . Simulating an illness while at a client location for a sales call and then recovering once listening devices are installed
D . Obtaining fake government credentials and impersonating law enforcement to gain access to a company facility

Answer: A