Jackie is an insured under a disability income policy. As a result of a serious illness, Jackie has been totally disabled for the past 8 months, and her policy has been paying her a total disability benefit of $1,000 per week. She is now feeling much better and has decided to go back to work on a part-time basis to see if her recovery is complete. For the first three months of her part-time employment, Jackie's disability policy will pay her a benefit of $500 per week. This $500 weekly income is considered what type of benefit under a disability income policy? O a "partial disability" benefit O a "presumptive disability" benefit O a "residual disability" benefit O a "rehabilitation" benefit