The Medical Information Bureau is primarily made up of members from which group?

The Medical Information Bureau (MIB) is primarily comprised of members from the insurance industry, specifically life and health insurance companies. The MIB serves as a resource for these insurers, providing them with information about applicants’ medical histories and other related data to aid in underwriting decisions. This collaboration allows insurance companies to assess risk more effectively when evaluating potential policyholders.

Insurance companies contribute reports about the applications they receive, creating a shared database that helps insurers avoid fraudulent applications and provides a more accurate picture of the applicant's health status. This is vital for life insurance underwriting, as it helps determine the appropriate coverage and premiums based on an individual's health risks. Therefore, the correct answer reflects the MIB's role as a collective resource primarily for the insurance sector.