Karen, age $16,$ earned $$3,000$ as a counselor in camp and has $$10,000$ of interest and dividend income for $2021.$ Karen is a dependent of her parents. Karen will file her own tax return for $2021.$ In computing her tax liability for $2021,$ which statement is true?

Karen, age $16,$ earned $$3,000$ as a counselor in camp and has $$10,000$ of interest and dividend income for $2021.$ Karen is a dependent of her parents. Karen will file her own tax return for $2021.$ In computing her tax liability for $2021,$ which statement is true?