Why Is It a Bit Risky for Policy Makers to Rely

Why is it a bit risky for policy makers to rely on health information entered into the claims data banks of insurance companies?

A) People tend to make large numbers of false claims, which skews the results.
B) Insurance claims contain only data about past events, not future events.
C) It is unethical for analysts to gain access to the private medical records of patients.
D) This source would not likely include relevant information on everyone in the target population.