A doctor who is receiving Disability Income benefits is not able to return to work...

The correct answer is A. A residual benefit clause permits an insured who has returned to work on a limited basis, but still suffers a loss of income because of disability, to receive partial disability benefits. The doctor is able to practice part-time but cannot resume full-time work, so the disability continues to cause an earnings loss. Residual benefits are intended to encourage rehabilitation and return to productive work without forcing the insured to lose all benefits immediately. The benefit amount is usually tied to the percentage of income lost compared with pre-disability earnings, subject to policy requirements. A contingent benefit clause and concurrent benefit clause are not the standard disability-income provisions that address partial return to work. A guaranteed insurability rider permits future increases in coverage without proof of insurability; it does not pay benefits for a continuing partial disability. Residual disability should be distinguished from total disability, which generally requires inability to perform the duties defined in the policy. Study Guide References/Topics: Policy Provisions, Clauses, and Riders; Disability Income Insurance; Residual Disability Benefits.