Answer:
E. There is not enough information to determine Keith's discretionary income
Step-by-step explanation:
The discretionary income is the income which is left after paying the taxes, food, rent, medical expenses, and other "necessities
Since in the given situation, all the information is given related to discretionary income but the tax rate is not given or the taxes paid is not given due to which we are unable to compute the discretionary income for the last year