Answer:
a. less than half
Step-by-step explanation:
Single retirees tend to have less than half of the household income as married couple retirement households. This is mainly due to the fact that married couples have two complete retirement incomes coming in every month. One for each individual in the relationship, many times one individual in the relationship is making much more in retirement than their spouse. Therefore, a single retiree would have less than half since they are alone and only getting one retirement check, so if they worked in the same field as the married couple they would still only be getting half of what the married couple make.