30.A hacker is attempting to access the Ohio Divisional Controller's account using that Controller's user ID and password. Through reconnaissance the attacker determines that access security is centrally administered at corporate headquarters in Texas.The hacker contacts the appropriate service desk at headquarters and convinces them to reset the password. The hacker now has access to this new password.What type of attack did the hacker use?

(a) Social engineering

(b) Phishing

(c) Spear phishing

(d) Trojan