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Theresa, age 13, is a dependent of her parents (her parents provided over half of her support). Her only source of income in 2020 is $7,500 of interest income on bonds given her by her grandparents. Theresa's marginal tax rate is 10%, and her parent's marginal tax rate is 37%. Theresa's tax for 2020 is (kiddie tax rules for 2020)

A) $2,071.

B) $2,200

C) $6,400

D) $7,500.