Successful social engineering attacks can BEST be prevented through:

A.
reemployment screening.

B.
close monitoring of users’ access patterns.

C.
periodic awareness training.

D.
efficient termination procedures.

Explanation:
Security awareness training is most effective in preventing the success of social engineering attacks by providing users with the awareness they need to resist such attacks. Screening of new employees, monitoring and rapid termination will not be effective against external attacks.