Nain is a front-desk receptionist at a large corporation. After a recent payday for the employees, Nain received a phone call from someone claiming to be an employee who was out-of-state on an assignment. This person asked Nain whether his check had been deposited, and to verify that the check was written to a specific account name and bank routing number. This occurrence may be a type of attack known as a:

A.
pharming attack.

B.
phishing attack.

C.
social-engineering attack.

D.
denial-of-service attack.