Final answer:
Maggie can deduct her entire loss on her 2013 tax return.
Step-by-step explanation:
Maggie, as a calendar year taxpayer and owner of a home in Topeka that was damaged by a tornado in 2013, can deduct her loss on her 2013 tax return. The fact that the area where Maggie lives was declared a federal disaster area allows her to claim the deduction. Therefore, the correct answer is B. her entire loss on her 2013 tax return.