The correct answer is D — limited health insurance policies. Limited health insurance is designed to provide benefits for a narrowly defined event, disease, service, or category of loss rather than the broad spectrum of expenses normally addressed by comprehensive medical coverage.

A travel accident policy provides narrowly focused accident protection associated with travel or specified transportation exposures. Similarly, a specified or dread-disease policy pays benefits only when the insured experiences a specifically designated condition, such as cancer or another condition listed in the contract. Because their benefit triggers and covered losses are intentionally restricted, both fit the limited-policy classification.

The Series 17-70 examination outline makes this distinction directly. It includes Limited versus comprehensive coverage, “Limited policies,” “limited benefits and amounts,” and specifically identifies Accident-only and Specified (dread) disease policies among the tested forms.

Options A and B describe methods of organizing insured persons rather than the limited nature of the coverage. Option C, “personal health policies,” is too broad and does not identify the essential characteristic being tested.

An adjuster must recognize that a limited policy does not provide general medical insurance merely because an insured experiences medical expenses. Benefits are payable only when the loss falls within the policy's narrowly stated coverage trigger.

Therefore, D is correct.