Final answer:
The amount that qualifies as a deduction from AGI for Amy is $6,250.
Step-by-step explanation:
The amount qualifies as a deduction from AGI for Amy is $6,250 (option c).
When Amy sold her personal residence on June 30, the real estate taxes were not prorated between the buyer and the seller, meaning that Amy paid the full amount of the taxes for the period from March 1 through August 31. Therefore, the taxes on residence amounting to $6,250 can be deducted from her Adjusted Gross Income (AGI).