Martha files a return as a single taxpayer. She received $$12,000$ of social security benefits, $$14,000$ of interest income, and $$8,000$ of nontaxable municipal bond interest. How much is the taxable income? Her social security base$-$threshold is $$25,000.$

Seleccione una:

a$.1,500$

$$ b$.6,000$

$0.0$

O d$.3,000$