Jurisdiction M Imposes an Individual Income Tax Based on the Following

Jurisdiction M imposes an individual income tax based on the following schedule.
Rate $\quad$$\quad$$\quad$ Income bracket
5% $\quad$$\quad$$\quad$$\quad$ $-0- to $50,000
+ 8% $\quad$$\quad$$\quad$ $50,001 to $200,000
+ 12% $\quad$$\quad$$\quad$ $200,001 and above
-Which of the following statements is true?

A) If Mrs Hall's taxable income is $227,000, her average tax rate is 12%.
B) If Mr. Poe's taxable income is $41,200, his marginal tax rate is 8%.
C) If Ms. Kaye's taxable income is $63,800, her marginal tax rate is 8%.
D) None of the choices are correct.