Ralph is single and has the following items for the current year: nonbusiness capital gains $ 9,000nonbusiness capital losses (3,000)interest income 6,000itemized deductions (none of the amount resulted from a casualty loss) (10,000)in calculating ralph's net operating loss, and with respect to the above amounts only, what amount must be added back to taxable income (loss)? a. $4,000b. $0c. $3,000d. $2,000e. none of these choices are correct.