Which of the following data privacy concerns can be attributed specifically to blockchain technologies?

A core feature of blockchain technology is immutability—once data is recorded, it cannot be altered or deleted. While this supports integrity and transparency, it also creates a conflict with data privacy regulations such as the General Data Protection Regulation (GDPR), which grants individuals the “right to be forgotten.” The inability to erase personal data stored on blockchain creates a compliance challenge.

Options A and B are incorrect: phishing is not inherent to blockchain, and transactions are not easily tampered with (immutability actually prevents that). Option C is misleading because regulations address data use but do not “overregulate” blockchain specifically.