Nan's salary in 2020 is $40,000. Nan elects to defer 5% of her salary into her employer's 401(k) plan. Her employer provides a matching contribution on the first 4% contributed. What is the net impact on Nan's 2020 taxable income from these items? Oa. $40,000 Ob. $39,600 Oc. $41,600 Od. $38,000 Oe. None of these choices are correct