Final answer:
Terrence's act of using stolen credentials to access and copy a company's proprietary information is an example of corporate espionage, where such information is illicitly obtained for competitive advantage.
Step-by-step explanation:
Terrence's actions, where he uses stolen credentials to log into a company's computer network and copies proprietary information, is an example of corporate espionage. Corporate espionage refers to efforts made by a company or individual to obtain trade secrets, proprietary information, or any form of business intelligence through illicit means. In this case, Terrence's unauthorized access and acquisition of proprietary information meet the criteria for corporate espionage.
The act does not align with the other options provided: Phishing typically involves tricking individuals into providing sensitive information through deceptive communications; Ransomware is a type of malware that encrypts a victim's files and demands payment for the decryption key; Data breach is a broader term that refers to the unauthorized access of data, and while Terrence's actions do result in a data breach, the scenario specifically highlights the act of stealing information for competitive advantage, which is the essence of corporate espionage.