please help me solve and explain this question

for my opinion: basic application of 199A becomes more complex once a taxpayer reaches certain taxable income thresholds. These taxable income thresholds?determined without regard to the QBI deduction?are $326,600 for married taxpayers filing jointly and $163,300 for single and head-of-household taxpayers in 2020.In 2019, these amounts were $321,400 and $160,700.

Therefore I choose Zero, however this answer is partially correct.

Alana is an individual and she files her tax return using the single filing status. The only income she received in 2019 was qualified divident income of $25,000. What income tax bracket will be used to calculate the tax that she owes for 2019? The Zero percent bracket V the 37% bracket The 20% bracket the 15% bracket Feedback Check My Work Partially correct