What is one of the primary roles of Privacy Enhancing Technologies (PETs)?

Privacy Enhancing Technologies (PETs) are specifically designed to help address data security and privacy concerns by minimizing the risk of personal data exposure and enhancing user privacy. They achieve this through various means, such as anonymization, encryption, and other techniques that protect data during processing and storage. By directly targeting and mitigating risks associated with the handling of personal data, PETs play a crucial role in promoting compliance with privacy regulations and fostering trust among users.

Although other options suggest functions related to data management and processing, they do not fundamentally align with the primary goals of PETs. For instance, increasing data complexity and enhancing data mining algorithms do not inherently prioritize privacy; rather, they may focus on operational efficiency or data utility. Facilitating data sharing also may not prioritize privacy protections, as it could lead to increased exposure of individuals' personal information. Thus, the primary role of PETs remains focused on safeguarding privacy and ensuring data security, making option C the most accurate choice.