Katie Pays $10,000 in Tax-Deductible Property Taxes

Katie pays $10,000 in tax-deductible property taxes.Katie's marginal tax rate is 25%,average tax rate is 24%,and effective tax rate is 20%.Katie's tax savings from paying the property tax is:

A) $1,600
B) $2,000
C) $2,400
D) $2,500
E) $10,000