Answer:
c. Piggybacking
Step-by-step explanation:
Piggybacking is a situation where a person tags along with another person who has authorized access into a restricted area. Pharming or phishing is a scamming practice in which a malicious code on a computer or server misdirects users to other websites without their knowledge or consent. Man trapping refers to a physical security device used to catch trespassers. Spear phishing is an electronic communications or email attack that seeks unauthorized access to sensitive information from individuals or organization.
Based on the above, option c is the correct answer.