A clinic's operations manager removes patient names from a small set of complaint records before analysis. The records still include each patient's age, rare diagnosis, town and appointment date. What is the main remaining risk?

Answer: C — The combined details could still identify individuals, so further redaction or aggregation, and a check with the privacy lead, are needed.

Indirect identifiers such as age, a rare condition, location and dates can point to a specific person even without a name, so the data isn't yet anonymized (c). Removing names alone (a) is not always enough. Tone (b) and file size (d) are not data-protection concerns.