Answer:
correct option is B. $10
Step-by-step explanation:
given data
state income tax refund = $900
interest over payment = $10
solution
we know that Federal and the state income tax refund is an excluded from taxpayer taxable income to extent
so that here refund will not reduces amount of tax for given earlier year
so here amount of state tax refund and the interest is taxable in Clark 2020 federal income tax return is $10
so here correct option is B. $10