A customer of a local bank has called to complain that when she attempted to log in to the banks web site to check her account, she found herself on another (almost identical) web site which was asking her to transfer funds to another account for safe-keeping. It would appear that the web site of the legitimate bank has been a victim of

a. a Denial-of-Service attack.

b. a logic bomb.

c. a white hat hacker attack.

d. DNS poisoning.