Vervet County Levies a Real Property Tax Based on the Following

Vervet County levies a real property tax based on the following schedule. $$\begin{array} { | c | c | } \hline \text { Rate } & \text { Arered vahe } \\\hline 3 \% & \$ - 0 \text { - to } \$ 250,000 \\\hline + 1 \% & \$ 250,001 \text { ard above } \\\hline\end{array}$$ Which of the following statements is false?

A) If Mr. Clem owns real property valued at $112,500, his average tax rate is 3%.
B) If Ms. Barker owns real property valued at $455,650, her average tax rate is 2.1%.
C) If Ms. Lumley owns real property valued at $750,000, her marginal tax rate is 1%.
D) None of the above is false.